Through the application of radiometric dating techniques, the relative and absolute ages of rocks and fossil records offer proof of the earth's geographic past.
The geologists' dating techniques are typically based on radioactive dating.
To date the history of such events, credible sources of information such as the natural decay of the elements or compounds contained in the artifacts are used.
For instance, Red Rock Canyon is a region of geologic significance to all people.
The Red Rock Canyon National Conservation area is a beauty that took millions of years to create. Red Rock Canyon was discovered at the bottom of an ocean basin around 500 million years ago.
This ocean basin has accumulated limestone that is home to marine life fossils. The Aztec Sandstone has been found to contain the footprints of two-footed, meat-eating dinosaurs.
There were also uncovered the footprints of small creatures including spiders, scorpions, early mammals, and proto-mammals. Red Rock Canyon's fossils and rock formations provide proof of the planet's geologic past.
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Viewing the shape of a bacterial or archaeal cell using a microscope gives a great deal of information about the metabolism and lifestyle of the organism. question 11 options:
a. true
b. false
The statement is false that viewing the shape of a bacterial or archaeal cell using a microscope gives a great deal of information about the metabolism and lifestyle of the organism.
Archaeal cell is the prokaryotic unicellular organism, that live in extreme habitats. These habitats can be thermal hot springs, extreme salty waterbodies or in areas producing methane gas. This is the reason they are also called extremophiles. Examples are: methanogens, halophiles, etc.
Metabolism refers to all the chemical reactions that take place inside an organism's body. Metabolism is made up of two phenomena: anabolism and catabolism. Anabolism is the formation of larger molecules from smaller ones, while catabolism is the breakdown of larger molecules into smaller ones.
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Note that common tasks are listed toward the top, and less common tasks are listed toward the bottom. according to o*net, what are common tasks performed by veterinarians? check all that apply. advising animal owners operating equipment treating sick or injured animals feeding and watering farm animals examining animals training animals
Common task such as examine animals to assess their health and diagnose problems,Treat and dress wounds,Perform surgery on animals,Test for and vaccinate against diseases,Operate medical equipment, such as x-ray machines,Advise animal owners about general care, medical conditions, and treatments,Prescribe medication.
Treat unwell or injured animals through prescribing medication, placing bones, dressing wounds, or acting surgery. Inoculate animals towards numerous sicknesses, inclusive of rabies or distemper. Examine animals to come across and decide the character of sicknesses or injuries.
Medical specialists regularly speak approximately the “Standard of Care,” a hard and fast of recommendations that outline the suitable remedy for a selected fitness problem. The fashionable of care is what facilitates make certain that sufferers obtain a comparable primary stage of care regardless of wherein they are treated
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Answer:A,B,C,E
Explanation:Just did It.
What part of the desmosome attaches cells to each other across intercellular spaces?
Tight junctions desmosome attaches cells to each other across intercellular spaces
Not all junctions between cells produce cytoplasmic connections. Instead, tight junctions create a watertight seal between two adjacent animal cells.
What is a Cell Junction ?A family of cellular structures known as cell junctions (or intercellular bridges) is made up of multiprotein complexes that allow contact or adhesion between adjacent cells or, in animals, between a cell and the extracellular matrix.
Cell junctions connect cells inside tissues and control tissue homeostasis in vital cell functions such as migration, proliferation, and function of the tissue barrier.Occludin, members of the claudin family, JAMs 1-3, cingulin, and linker proteins from the ZO family are all components of tight junctions and are responsible for binding the aforementioned proteins to one another or to the actin cytoskeleton. VASP has been identified as a component of the zonula occludens-1 (ZO-1) protein complex in both endothelial and epithelial cells.Learn more about Cell junction here:
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Column A
1.
bacteriophage:
bacteriophage
2.
capsid:
capsid
3.
lysogenic infection:
lysogenic infection
4.
lytic infection:
lytic infection
5.
prophage:
prophage
6.
retrovirus:
retrovirus
Column B
a.the type of infection in which a virus does not immediately start replicating itself but inserts a piece of DNA ino the host cell's genome which becomes activated at a later date
b.a type of infection in which a virus immediately starts replicating in the host cell
c.a virus that, upon infection of a host cell, makes a DNA copy of its RNA and inserts that piece of DNA into the cell's genome
d.the protein coat that surrounds a virus
e.a piece of virus DNA that becomes a part of a bacterium's genome- until activated to produce new bacteriophages
f.a virus that infects bacteria
The biological process by which a bacteriophage infects a bacterium, fusing its DNA with that of the host to prevent the host from being wiped off. Thus option 1.f 2.d 3.a 4.b 5.c 6.d is correct.
What is property of bacteriophage?The nucleic acid can be single-stranded or double-stranded and can either be DNA or RNA. Phage comes in three different structural configurations: a filamentous form, an icosahedral (20-sided) head with a tail, and an icosahedral head without a tail.
Bacteriophage infection of a bacterium, followed by the generation of additional phage particles and the lysis, or dissolution, of the cell.
Bacteriophage enzymes break down the bacterial cell wall by hydrolyzing its protein and carbohydrate constituents from the outside as well as the inside.
Therefore, 1.f 2.d 3.a 4.b 5.c 6.d is correct according to given option about bacteriophage.
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Answer:
Bacteriophage: a virus that infects bacteria
capsid: the protein coat that surrounds a virus
lysogenic infection: .the type of infection in which a virus does not immediately start replicating itself but inserts a piece of DNA into the host cell's genome which becomes activated at a later date
lytic infection: a type of infection in which a virus immediately starts replicating in the host cell
prophage: a piece of virus DNA that becomes a part of a bacterium's genome- until activated to produce new bacteriophages
Retrovirus: a virus that, upon infection of a host cell, makes a DNA copy of its RNA and inserts that piece of DNA into the cell's genome
Explanation:
Which herb should the nurse expect to be used by the patient who reports using herbs to obtain an erection?
Yohimbine (Pausinystalia yohimbe)
Yohimbine (Pausinystalia yohimbe) is the herb the nurse expects to be used by the patient who reports to obtain an erection.
The herb used to treat erectile dysfunction is called yohimbine (Pausinystalia yohimbe). The herb sage (Salvia officinalis) is used to control menstruation. The medication used to relieve menstrual cramps is chamomile (Matricaria recutita). Premenstrual syndrome and irregular menstruation are treated with black cohosh (Cimicifuga racemosa).What negative impacts can Yohimbe have?Yohimbine, a substance found in yohimbe, has been associated with serious adverse effects like irregular pulse, heart attack, and other things. When under the supervision of a healthcare professional, it can be used temporarily safely. However, it must not be used without a doctor's supervision.Is testosterone increased by yohimbe?The responders had greater free testosterone levels at baseline, but these levels did not significantly rise with the higher yohimbine dosages. Dehydroepiandrosterone sulfate levels in the responders were not noticeably greater at baseline, and they remained unchanged after receiving a larger dose of yohimbine.To learn more about erectile dysfunction visit:
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Operant conditioning which encompasses blank and blank refers to the process and selectively effects of?
Operant conditioning which encompasses reinforcement and punishment refers to the process and selective effects of consequence on behavior.
Operant conditioning is the process of learning to behave in a way so that rewards can be obtained and at the same time punishments can be avoided. It is used by humans as well as animals.
The main purpose of operant conditioning is to reinforce required behavior by providing a system of reward and removing undesirable behavior by giving punishments.
It can be divided into positive reinforcement, negative reinforcement, positive punishment & negative punishment.
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The two most commonly used antibiotics for therapy against uncomplicated tuberculosis are?
The two most commonly used antibiotics for therapy against uncomplicated tuberculosis are isoniazid , ethambutol, and pyrazinamide. Mycobacterium tuberculosis is the bacteria that causes tuberculosis (TB). Although the TB germs typically assault the lungs, they can also affect the kidney, spine, and brain.
Not every person who contracts the TB germs gets ill. Mycobacterium tuberculosis is a type of bacteria that causes tuberculosis (TB). When a person with active TB disease in their lungs coughs or sneezes, TB bacteria-containing droplets that are ejected are inhaled by the other person. Although TB has the potential to be a serious infection, the correct drugs can cure it.
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One of the criticisms of selye's general adaptation syndrome concerns the fact that ________ produce the same biological responses.
Selye's general adaption syndrome has been criticized in part because not all stressors result in the same biological reactions.
How to define a syndrome?An accumulation of signs or symptoms that point to the existence of one particular illness or a higher risk of contracting it.
What kind of syndromes are examples?As a result, there are many different conditions that exist today, including Down syndrome, AIDS, Asperger's, carpal tunnel syndrome, chronic fatigue syndrome, Tourette's syndrome, sick building syndrome, and many more.
Down syndrome variations:Trisomy 21 affects approximately 95% of individuals with Down syndrome.About 3% of those with Down syndrome have translocations, which is a rather uncommon kind.About 2% of individuals with Down syndrome have mosaic Down syndrome.To know more about Syndrome visit:
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What were the three key observations made by darwin that allowed him to deduce that natural selection is a primary driver of evolution?.
The three point which deduce that natural selection is a primary driver of evolution are:
More offspring are produced than survive by organisms.Population members differ from one another, andThe relative frequency of advantageous variants rises with time.Natural Selection- An evolutionary mechanism is natural selection. Environment-adapted organisms have a higher chance of surviving and dispersing the genes that contributed to their success. Over time, this mechanism leads to the evolution and divergence of species.
Genes- The fundamental genetic component transferred from parent to child. Genes are composed of DNA sequences and are organized sequentially at specified sites on chromosomes in the cell nucleus.
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In pea plants, green color (G) is dominant to albino (g). If we cross two pea plants that are heterozygous for color, what would be the expected phenotype ratio of the offspring? Do the Punnett square and write the phenotypic ratio in the space below:
Explanation:
risky behavior and abuse
When two heterozygous plants are crossed, then the offspring will be of two different phenotypes, such as green and albino. Out of the four individuals, three will be green and one will be albino. The phenotypic ratio is 3:1.
What is a monohybrid cross?A monohybrid cross involves a single character or trait. Example: the colour of a pea plant. In the pea plant, green is dominant over albino. Green colour is represented by G. Albino colour is represented by g.
The homozygous green plant is represented by GG. The heterozygous green plant is represented by Gg . The homozygous albino plant is represented by gg .
When two heterozygous plants (Gg) are crossed, each parent will produce two types of gametes, such as G and g. There will be offspring of the GG, Gg and gg type. Both homozygous (GG) and heterozygous (Gg) plants will be green. The punnett square is explained below
Hence, there will be two different phenotypes, such as green and albino, from the cross of two heterozygous individuals. The phenotypic ratio is 3:1.
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In terms of fatalities, the most dangerous natural disasters are caused by ____.
In terms of fatalities, the most dangerous natural disasters are caused by long term weather patterns that causes droughts.
A drought is a prolonged period of unusually dry weather caused by a lack of rain. A lack of precipitation can cause a number of issues for local communities, such as crop damage and a lack of drinking water.
Drought and certain weather patterns have been linked by geologists. A weather pattern reveals where the temperature of the surface water in the Pacific Ocean rises along the central South American coast. Warmer waters influence storm patterns and are linked to droughts.
When the temperature of the Pacific Ocean's surface water along South America's coast falls. The cooler waters influence storm patterns by causing drier-than-normal conditions. As a result, climate/weather change increases the chances of drought worsening in many parts of the world.
How drought is impacted by climate change?
Warmer temperatures accelerate evaporation, which decreases surface water and dries out the soil and vegetation. Low precipitation periods become drier as a result, as opposed to when it is cooler. Affected areas are becoming drier as a result of climate change's timing changes for water availability.
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which of the following is NOT a characteristic that a living thing must follow
-A. Order
-B. Reproduction
-C. Growth & Development
-D. Energy processing
-E. Be related to at least 2 other species
-F. Responds to the environment
-G. Regulation
-H. Evolutionary adaptation
Growth & Development is the not a characteristic that a living thing must follow
Different characteristics of growth and development like intelligence, aptitudes, the body structure, the height, weight, color of the hair and eyes are highly influenced by the heredity. Sex: Sex is a very important factor which actually influences the human growth and the development It can help them learn new skills, to grow their career, and to improve their mental health. Human growth and the development are the important because it also helps them to learn new skills, improve their quality of life, and also improve their mental health. Human growth and the development are important in the continuity of the species.
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Match each word to It's correct meaning.
1. carbon dioxide
2. respiration
3. saprophyte
chemical process of cells doing
work; breathing
organism that gets its food from
decaying plants or animals
gas given off in animal respiration
that is absorbed from the air by plants in
photosynthesis
Answer:
and
Explanation:
Carbon doioxide-gas given off in animal respiration
that is absorbed from the air by plants in
photosynthesis.
Respiration - chemical process of cells doing
work; breathing.
Saprophyte-organism that gets its food from
decaying plants or animals
What kind of chemical does saccharomyces cerevisiae ferment to produce alcohol? mcb 100
Saccharomyces cerevisiae ferments carbohydrates to produce alcohol and carbon dioxide.
Saccharomyces cerevisiae, also known as baker's yeast, is a unicellular fungus under the Phylum Saccharomyces under the Kingdom Fungi. It is used in bread and alcohol production. It is commonly known as yeast. S. cerevisiae produce alcohol and carbon dioxide from carbohydrates through a biochemical process called fermentation.
Fermentation is the process whereby glucose is broken down in an oxygen lacking environment. There are two types of fermentation - alcohol fermentation and lactic acid fermentation. Yeasts like S. cerevisiae make use of alcohol fermentation. The alcohol produced as a result is used in production of alcoholic beverages and the carbon dioxide is used in bread production to proof dough.
Muscle cells can make use of lactic acid fermentation to produce energy in an oxygen lacking environment.
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Will the velocity of the book change as it moves across the surface WITH friction? Explain your answer.
Answer:
yes
Explanation:
Friction slows things down. It causes a opposite force on the book causing the speed to slow and come to a stop.
When organisms leave the group they were born into and join another group, this can alter allele frequencies in the new group. What mechanism is this?.
The answer to the question is gene flow.
What is gene flow?Gene flow, sometimes referred to as gene migration, geneflow, and allele flow in population genetics, is the exchange of genetic material between populations. A population can be deemed to be a single effective population if two populations have equal allele frequencies and the rate of gene flow is high enough. It has been demonstrated that all it takes is "one migrant each generation" to stop populations from drifting apart. Depending on how severe the selection pressure is, populations can diverge even when they are exchanging alleles. The exchange of genetic variety between populations is facilitated through gene flow. By altering allele frequencies, migrants affect how genetic variation is distributed among populations.
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The _____ is a type of regulator protein that binds to a region of dna in the promoter of a gene called the operator and prevents transcription from taking place.
The repressor is a type of regulator protein that binds to a region of DNA in the promoter of a gene called the operator and prevents transcription from taking place.
In the field of science, a regulator protein can be described as a kind of protein that affects the transcription of a gene by having an influence on particular DNA sites. The rate of synthesis of various proteins is controlled by the regulator proteins.
A repressor is a kind of regulator protein that prevents the transcription of a particular gene. When the rate of a protein in the body has reached normal, the transcription of the protein needs to be stopped in order for more protein of that kind to be formed. The repressor binds itself to the operator region for the gene, hence stopping the transcription process until the protein is required again.
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After suffering a stroke, lulu finds she cannot move her left leg. this would suggest that the stroke damage is in the area of the:_______
After suffering a stroke, lulu finds she cannot move her left leg. this would suggest that the stroke damage is in the area of the Left Frontal Lobe.
What is Frontal Lobe?The frontal lobe is the largest of the four primary lobes of the brain in animals, and it is placed at the front of each cerebral hemisphere (in front of the parietal lobe and the temporal lobe). It is divided from the parietal lobe by a groove between tissues known as the central sulcus and from the temporal lobe by a deeper groove known as the lateral sulcus (Sylvian fissure). The frontal pole, one of the three poles of the cerebrum, is the most anterior rounded section of the frontal lobe (albeit it is not well-defined) .
The management of higher level executive functions as well as voluntary movement and expressive language depend on the frontal lobes. Executive functions are a group of cognitive abilities that include the ability to organise, plan, take the initiative, self-regulate, and control one's actions in order to accomplish a task.
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All living things require an outside source of materials and energy. the sum total of all chemical reactions that occur within a cell to provide these materials and energy is called?
All living things require an outside source of materials and energy. The sum total of all chemical reactions that occur within a cell to provide these materials and energy is called metabolism.
Energy is the ability to perform work. In an organism's body energy is required to perform each and every processes inside the body. In eukaryotic organisms this energy is derived by the mitochondria. In humans and various other species, the major source of energy is ATP.
Metabolism is the sum total of all the reactions taking place inside the body. These reactions can be anabolic or catabolic. The anabolic reaction involve the formation of larger molecules from the smaller ones. The catabolic reactions involve the breakdown of larger molecules into smaller ones.
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A prokaryotic cell may possess each of the following cellular components except? ribosomes. flagella. a nucleus. a cell wall. a cell membrane.
Answer:
A.
Explanation:
Prokaryotic cell is a primitive cell and has limited functions. Thus, nucleus is the correct answer.
What are prokaryotes?Prokaryotes are the oldest inhabitants on the earth. They are single cell structures.
Prokaryotic cells (karyon = nucleus) are not well equipped with the cellular structures. They lack nucleus and the nuclear membrane. The other membrane bound organelles are also absent in prokaryotes.
Prokaryotes contain cilia or flagella as locomotory organs. Cytoskeleton is absent in prokaryotes.
Prokaryotes can thrive in the extreme conditions. They can respire anaerobically or can even withstand high temperatures.
Bacteria are considered as prokaryotes. Bacteria dominate the earth and are of various types based on their shape, function etc.
The other examples of prokaryotes include blue-green algae and mycoplasma.
Prokaryotes reproduces without the fusion of gametes. It forms spores or employs other methods of somatic reproduction.
Therefore, prokaryotes, though being the oldest are important for the ecosystem.
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Which molecule can function as a recognition signal for interactions between animal cells?
Glycolipids molecule can function as a recognition signal for interactions between animal cells.
Describe glycolipids:Lipids having a carbohydrate connected by a glyosidic bond are known as glycolipids. Their job is to keep the cell membrane stable and make it easier for cells to recognize one another, which is essential for the immune response and for the connections that allow cells to join together to form tissues.
What use do glycolipids function?Glycolipids are crucial parts of biological membranes that serve a wide range of purposes. They might function as receptors, be necessary for cell aggregation and dissociation, be in charge of particular cellular interaction, and be involved in signal transduction. This protein does not transport phospholipids; instead, it largely transports various glycosphingolipids and glycerol glycolipids between internal membranes.
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What do gymnosperms and angiosperms have in common?
a. seeds
b. flowers
c. spores
d. none of the other answer options are correct
A promoter that affects only genes that are on the same piece of dna is referred to as a(n) _____-acting promoter.
A promoter that affects only genes that are on the same piece of DNA is referred to as a cis acting promoter.
What is DNA?Deoxyribonucleic acid, a polymer made of two polynucleotide chains that coil around one another to form a double helix, contains the genetic material required for the growth, development, and reproduction of all recognized organisms as well as a number of viruses. Ribonucleic acid (RNA) and DNA are examples of nucleic acids. Along with proteins, lipids, and complex carbohydrates (polysaccharides), nucleic acids are one of the four main categories of macromolecules required for all known forms of life.
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Biologists identify and characterize climate in an area primarily by analyzing __________.
The average annual temperature, precipitation, and yearly variation in temperature and precipitation are the primary metrics used by biologists to identify and characterize climate in a region.
What is the precipitation process?Only when these will merge into larger drops through turbulence, in which water droplets clash and produce even larger droplets, is precipitation feasible. The droplets eventually descend, agglomerate, and grow heavy from resistance, and they finally fall as rain.
What causes precipitation?When cloud droplets or ice particles in the clouds develop and merge, they can no longer be supported by the updrafts (such as upward moving air) in the clouds and fall to the ground, forming precipitation.
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the introduction of fingerlings into the pond is called
A stocking
B clearing
C inoculation
D fertilisation
Answer:
Stocking
Explanation:
Peptic ulcer disease (pud) is most likely to affect which areas of the gastrointestinal (gi) lining?
Peptic ulcer disease (pud) is most likely to affect the mucosa lining of the stomach or duodenum.
Peptic ulcer disease refers to the occurrence of painful ulcers in the protective lining of the stomach of the duodenum. The stomach produces hydrochloric acid independently to digest the food. The mucosa is the protective lining of the stomach that protects it from the harm that may be caused by the HCl.
An excessive amount of HCl in the stomach or eating up of mucus lining by the bacteria can cause ulcers or sores in the stomach or duodenum. This is referred to as peptic ulcer disease. PUD can also be caused due to various other factors like genetic factors, consumption of alcohol, smoking, or excessive use of NSAIDs.
PUD primarily affects the mucosa lining of the stomach. Submucosa lining lies beneath the mucosa lining which can also get affected. Severe cases of PUD can also affect the Muscularis layer of the stomach.
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All of the following statements regarding the electrical activity of the heart conduction cell are false except?
During repolarization, calcium channels close and voltage-gated potassium channels open is the correct answer.
Repolarization is the change in membrane potential that occurs immediately following the depolarization phase of an action potential, which changes the membrane potential to a positive value, and restores it to a negative one. The membrane potential typically recovers to the resting membrane potential during the repolarization phase. Action potentials enter the falling phase as a result of the outflow of potassium (K+) ions. The K+ channel pore's selectivity filter allows the ions to flow through. The open calcium channels pass more calcium ions when the driving force for calcium entry increases during the repolarization of the AP, which causes an increase in calcium influx.
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The complete question is :
All of the following statements regarding the electrical activity of the heart conduction cell are false except?
A : A plateau is prolonged to ensure repolarization.
B : Depolarization of the nodal cells is due to fast voltage-gated calcium channels.
C : The first event is the result of slow voltage-gated sodium channel changing the resting membrane potential to -40 mV.
D : During repolarization, calcium channels close and voltage-gated potassium channels open.
ASAP PLEASE HELP ASAP
1.Alex poured some pond water into three beakers. She then put waterweed into each
beaker. She put the beakers in different places.
i) In which beaker did the waterweed grow best? Give the correct letter.
________
ii) The waterweed in the box changed from dark green to pale yellow. Why did this happen?
2.In the school pond there were lots of water lilies with large leaves covering the surface. There were not many plants growing below the surface. Suggest a reason
for this.
3.In another experiment, Alex put similar pieces of waterweed into two more beakers of pond water. She added fertiliser to one of them. She kept them both by a window.
i) Alex added fertiliser to beaker E. Suggest the results of this experiment.
ii) What do fertilisers contain to help plants grow? Tick the correct box.
1. (i) The waterweed will grow best in beaker A (in normal daylight).
(ii) The waterweed in the box changed from dark green to pale yellow. This happened because the black box blocked the light due to which the waterweed was not able to carry out the process photosynthesis.
2. There were not much plants growing below the surface in the school pond with lots of water lilies in it as the excessive growth of water lilies inhibited the penetration of light in the pond.
3. (i) The waterweed will grow better in beaker E containing pond water and fertilizer.
(ii) Fertilizers contain minerals which help the plants to grow.
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Evolution of shorter legs in anole lizards placed on small, hurricane-scrubbed islands is an example of which type of evolution?.
This type of evolution is known as Microevolution.
What is the meaning of evolution?Evolution is the descent modification of preexisting species. It is a process species adapt over time. There are two types of evolution: Microevolution and macroevolution.
Microevolution is defined as the changes in the frequency of the gene in the population. Several factors affect evolution geneflow, including natural selection, mutation, and genetic drift.
Pesticide resistance is one example of macroevolution. Microevolution is frequently seen in visible forms of evolution, such as antibiotic-resistant variable strains. Microevolution is the change in gene frequency that occur over time. Alleles are different forms of a gene. Allele frequencies are usually represented as a percentage.
This type of evolution is known as Microevolution.
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Which three of the following entities are acellular?.
a) prions archaea
b) viroids bacteria
c) viruses protists
d) fungi
Answer:
Prions archea, viroids bacteria, viruses protists are acellular while fungi is cellular.
While viruses have indeed been closely researched for more than a century for infections of people and animals, most viruses, particularly those that infect microorganisms, are still poorly understood.
Pathogenic RNA molecules are known as viroids. Contagious protein particles are identified as prions. Viruses are larger than that of viroids. Viroids are larger than prions in size.
Molds, wild yeasts, as well as mushrooms are examples of fungi. Numerous fungi are multicellular and also have nuclei in their cells. A protein-encased DNA or RNA core defines viruses being non - cellular organisms. Some scientists disagree with the notion that viruses are living things.
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