Option a is Correct. when we would look at non-staining organisms using a dark-field microscope. When examining materials in their natural form without staining them, phase-contrast microscopy is a very helpful approach.
A microscope (a tool for magnifying small things) in which the items are illuminated from the side at an extremely low angle, making the background appear black and allowing the objects to stand out against it.
In clear outline and with high contrast to their surroundings, objects that cannot be seen under regular light microscopy are viewed. NO! It would be pointless to use a wet mount if staining methods killed the microorganisms on the slide. Various more factors Wet Mounts require water, hence we are unable to employ 100X oil immersion.
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Which three structures are possessed by ALL bacteria? -cell wall,-cell membrane, -flagella, -ribosomes,-chromosomes
The movement of molecules into and out of the cell pool is regulated by a very thin layer of protein and lipid that covers the cytoplasm. At the locations where proteins are synthesized.
Which fruit has the greatest protein content?
Guava. The guava represents one of the plants with the greatest protein content. A astounding 4.2 kilograms of the material are included in each cup. Additionally a high supplier of protein and vitamin C, this tropical fruit.
What consequences do proteins have on the body?
These biochemical components that make up proteins are amino acids. Amino acids are used by the body to create hormones, enzymes, and both to construct and repair its bones and muscles.
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the cell structure immediately external to the cytoplasm is the?
The cell structure immediately external to the cytoplasm is the Cell membrane.
The cell membrane is in contact with the cytoplasm. All the other structures listed, if present, are external to the cell membrane.
All cells contain a membrane, known as the cell membrane or the plasma membrane, which isolates the interior of the cell from the external world. Lipidic bilayers make up the semipermeable cell membrane. Materials moving into and out of the cell are controlled by the cell membrane.
The gel-like liquid that makes up a cell's cytoplasm. Chemical reactions take place in it as the medium. It gives other organelles in the cell a base from which to function. The cytoplasm of a cell performs every task necessary for cell division, growth, and replication.
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what was happening in the world around the time when the first primate species evolved? (choose all that apply)
Extinction of Dinosaurs and evolution of fruit containing plants took place when primates first appeared on land.
Primates are a diverse order of mammals and have been known to appear after successful evolution of existing species. They are partitioned into the strepsirrhines, which incorporate the lemurs, galagos, and lorisids, and the haplorhines, which incorporate the tarsiers and the simians (monkeys and gorillas, the last option including people).
There were several changes happening in the world around the time when evolution of the first primate species took place. Dinosaurs had recently gone extinct and the evolution of first fruit bearing plant species were two major phenomena that happened at the right time when primate species came into existence. As there were not many volcanic eruptions so it could be estimated that the evolution of primate species took place in a comparatively natural environment.
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during what period did the tyrannosaurus rex live?
T. rex lived between 90 and 66 billion years ago, during the very conclusion of the Late Cretaceous.
Eggs were laid by T. rex?Whether or not they hatched, rex parents would take care of their young. Although no T. rex nests nor eggs have ever been unearthed, remains of other Tyrannosaur siblings indicate that they may have deposited 20 or more elongated at one time.
What is more deadly than a T. rex?The T-Rex was 40 feet long, 20 feet tall, and weighted a maximum of 15,000 pounds. The Giganotosaurus has the benefit because it is a larger dinosaur despite the close contrast. One of the biggest killers to ever prowl the Earth was the gigantosaurus.
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the human ear canal is, on average, 2.5cm long and aids in hearing by acting like a resonant cavity that is closed on one end and open on the other. the length of the ear canal is partially responsible for our sensitivities to certain frequencies. use 340m/s for the speed of sound when performing the following calculations.
The first resonant frequency is 34000 Hertz.
Does the length of ear canal affects the sensitivity?Yes, the length of the human ear canal affects our sensitivity to different frequencies. The ear canal acts like a resonant cavity, amplifying certain frequencies and dampening others. This is due to the resonance that occurs when the pressure waves generated by sound enter the ear canal and interact with its closed and open ends.
In how many parts human ear is divided?The human ear can be divided into three main parts: the outer ear, the middle ear, and the inner ear.
According to the formula for a closed-end air column:
f = v / (2 * L),
where f is the resonant frequency, v is the speed of sound in air (340 m/s), and L is the length of the ear canal (2.5 cm).
So, using the given values, the resonant frequency of the human ear canal can be calculated as follows:
f = 340 / (2 * 0.025)
= 34000 Hz.
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10) describe how increasing stress to the ocean would affect a food chain containing zooxanthellae, corals, parrotfish, and sharks
Increased levels of pollution and rising temperature create ocean stress and exhibit tremendous effects on the food chain comprising corals, sharks, parrotfish and zooxanthellae.
There are several factors that are known to affect the health of aquatic systems in the long run. Ocean pollution, ocean acidification, rising temperature and ocean deoxygenation are considered as some of important phenomenon that affect not just the qualitative parameter of water but also of the residing species.
Rising temperature make corals expel out zooxanthellae which results in death of corals later fading corals limit the food source availability for parrotfish and results in decline of their population. With lesser availability of animals to prey on, shark species eventually get reduced. And that's how the entire food cycle is affected.
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The ________ secretes messenger hormones that direct the function of the rest of the endocrine glands.
a. ovary
b. thyroid
c. pituitary
d. pancreas
The thyroid gland secretes messenger hormones which control how the other endocrine glands work. Your body contains glands, and these organs produce and release chemicals that enable various bodily functions.
What impacts the human thyroid?It's a component of the endocrine system and regulates a number of crucial bodily processes by creating and releasing specific hormones. Your metabolism—the process through which your body converts food you eat into energy—is primarily under the control of your thyroid.
Is thyroid illness an acute condition?You may have to regularly manage a thyroid problem for the rest of your life. A daily medicine is frequently necessary for this. Your doctor will keep an eye on your therapies and make changes as needed. With a thyroid condition, though, you can typically lead a regular life.
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There are several advantages that Mendel exploited in using garden peas as a system for studying inheritance. Indicate if the following are true or false about advantages of the garden pea as a model for study of inheritance.
(Click to select) True False 1. Pea plants vary in several different visible characters or traits.
(Click to select) True False 2. Pea plants have characters or traits that show blending and are not readily distinguishable.
(Click to select) True False 3. In pea plants, the male reproductive organs are in different flowers than the female reproductive organs.
(Click to select) True False 4. One version of each of the garden pea’s visible characters can disappear in one generation and reappear in the next.
(Click to select) True False 5. Pea plants can be bred to generate offspring that possess only one variant of a trait.
(Click to select) True False 6. Pea plants are large and hard to grow.
(Click to select) True False 7. Pea plants mature quickly and produce large numbers of offspring.
In the first generation following the cross, one form of a feature, such as tall, always concealed the other form, such as short. Mendel referred to the dominant trait as being visible, and the recessive trait as being hidden.
1. True pea plants differ in a number of obvious characteristics or traits.
2. False: No blending is depicted by pea plant characters.
3. False because pea plant flowers are heterosexual
4. False: Characters do not vanish; instead, the effect of the dominant allele obscures that of the recessive allele
5. True because true breeding lines can be developed using pea plants.
6. False, since pea plants are not difficult to grow.
7. Since pea plants mature quickly and have numerous offspring, it is true.
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the type of epithelium, a single layer with both tall and short columnar cells reaching the apical surface and shorter basal cells, is called .
The type of epithelium, a single layer with both tall and short columnar cells reaching the apical surface and shorter basal cells, is called simple epithelium.
Simple epithelia are composed of a single layer of cells that share an apical surface and are in direct touch with the basement membrane. These cells could be columnar, cuboidal, or squamous. The alveoli of the lungs contain simple squamous epithelium, and the structure of this epithelium is crucial for the exchange of gases between the blood and the lungs.
The epithelium is a type of body tissue that covers all of the internal and exterior body surfaces, lines hollow organs and body cavities, and makes up the majority of glandular tissue. Depending on where in your body it is, epithelial tissue has a range of purposes, including absorption, secretion, and protection.
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if 1 quart= 0.95liter how many milliliters are in 3 quarts?
proteins coded for by nuclear dna but found within mitochondria move from the cytoplasm into mitochondria using . group of answer choices signal sequences (peptides) random transport vesicles mrnas that are manufactured in the nucleus but translated by mitochondrial ribosomes attachment of ribosomes to outer mitochondrial pores and direct deposition into the inner mitochondrial compartment
Proteins coded for by nuclear DNA but found within mitochondria move from the cytoplasm into mitochondria using . A) signal sequences (peptides)
A mitochondrion is a kind of organelle present in the cells of most eukaryotes, including mammals, plants, and fungi. Mitochondria have a double membrane structure and employ aerobic respiration to produce adenosine triphosphate (ATP), which is used as a source of chemical energy throughout the cell.
Albert von Kölliker identified them in the voluntary muscles of insects in 1857. Carl Benda invented the name mitochondrion in 1898. The mitochondrion is commonly referred to as the "powerhouse of the cell," a term originated by Philip Siekevitz in a 1957 essay of the same title.
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41) Proteins coded for by nuclear DNA but found within mitochondria move from the cytoplasm into mitochondria using ________.
A) signal sequences (peptides)
B) random transport vesicles
C) attachment of ribosomes to outer mitochondrial pores and direct deposition into the inner mitochondrial compartment
D) mRNAs that are manufactured in the nucleus but translated by mitochondrial ribosomes
Bacterial ______ are sites of metabolite storage. A) nucleoids B) vacuoles C) inclusions D) pili E) periplasm Answer: C Bloom's Taxonomy
Metabolites are stored in bacterial inclusions. For instance, many bacteria store extra carbon in the form of glycogen or polyhydroxyalkanoates.
Where is DNA kept in bacterium cells?The bacterial chromosome is a single circular molecule that houses all of the DNA for the majority of bacteria. The chromosome joins a number of proteins and RNA molecules to form the nucleoid, an amorphous structure. This is located in the bacterial cell's cytoplasm.
What function do pili serve in bacteria?We come to the conclusion that F pili serve at least three roles during mating: I they allow the exchange of genetic material; (ii) they help establish interactions between mating pairs; and (iii) they pull mating cells into close contact, increasing the fertility of the union.
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Which rib attaches to the sternum at the sternal angle?
At the sternal angle, the second rib connects to the sternum. Because the first rib is concealed below the collarbone, the highest rib that may be detected by palpation is the second. As a result, the sternal angle and second rib are critical landmarks for identifying and counting the lower ribs.
The final two false ribs (11-12) are often known as floating ribs (vertebral ribs). These are short ribs that have no connection to the sternum. Instead, their little costal cartilages terminate within the lateral abdominal wall muscles.
The first rib (topmost) is the most bent and usually the shortest of all the ribs, beginning at thoracic vertebrae 1 and running down the spine (T1).
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the all-or-nothing principle maintains that once the electrical impulse reaches a _____, the impulse will fire.
According to the all-or-nothing concept, an electrical impulse will ignite once it reaches a certain threshold.
The electrical impulse that departs the sinus node is received by the atrioventricular node (also called AV node). There, impulses are momentarily delayed before continuing along the conduction pathway through the bundle of His and into the ventricles. The bundle of His separates into right and left channels known as bundle branches to activate the right and left ventricles.
The heart typically beats 60 to 100 times per minute while at rest as the electrical impulse travels through it, depending on the age of the person.
The ventricles contract once for each beat of the heart. The blood in the atria empties into the ventricles before the ventricles contract because the atria contract a little fraction of a second before the ventricles do.
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How many carbohydrates should a basketball player consume during an hour-long game?
a. 60-90 grams per hour
b. Greater than 120 grams
c. 90-120 grams per hour
d. 0-30 grams per hour
90-120 grams per hour is the amount of carbohydrates a basketball player should consume during an hour-long game and is therefore denoted as option C.
What is Carbohydrate?This is referred to as biomolecule or substance which contains carbon, hydrogen and oxygen and is responsible for the provision of energy to the body cells for its functioning.
90-120 grams per hour is the amount of carbohydrates a basketball player should consume during an hour-long game as any one below such quantity will be considered inadequate due to the rigorous activities involved.
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Which two sentences describes ways trichomes protect a plant?
A. They secrete substances.
B. They attract pollinating insects.
C. They deter insects.
D. They form a thick barrier.
The two sentences that describes ways trichomes protect a plant are: 'They secrete substances' and 'They form a thick barrier'.
What do you mean by trichomes?
Trichomes are tiny, hairlike outgrowths on the surface of plants. They are made up of cells that produce and contain resins and oils that give the plant protection, color, and scent. Some trichomes also contain substances that can be used as natural pesticides.
Trichomes are a type of outgrowth on the surface of plants that serve as a protective mechanism. They secrete substances that can repel predators, such as bitter tasting sap, as well as provide protection from UV radiation, drought, and other environmental stressors. Additionally, they form a thick barrier that acts as a physical shield, helping to prevent predators from consuming the plant.
Hence, options A and D are correct.
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a bodybuilder suffers an injury to their triceps muscle. they undergo a series of tests to assess the level of damage. when they try to get their triceps muscle to contract in response to excessive force, the muscle reflexively relaxes. but when the triceps tendon is tapped (like with a reflex hammer), nothing happens. what sensory aspect of muscle control is damaged in this case? explain.
A bodybuilder suffers an injury to their triceps muscle. they undergo a series of tests to assess the level of damage. when they try to get their triceps muscle to contract in response to excessive force, the muscle reflexively relaxes. but when the triceps tendon is tapped (like with a reflex hammer), nothing happens. The ssensory aspect of muscle control is damaged in this case is the tearing of the fibers that make up the triceps muscle.
The triceps are the muscles that are located at the top of the back and side of the arm and have a function to help straighten the arm. Several injuries can occur in bodybuilders who often overuse their muscles.
Injury is a damage to the structure or function of the body due to physical or chemical coercion or pressure. One type of injury that bodybuilders often experience is a triceps strain, an injury that occurs when there is a tear in one or more of the fibers that make up the triceps muscle. This tear occurs due to excessive muscle contraction or when the muscle contraction is not ready. A bodybuilder who has this injury is advised to rest and consume food according to doctor's recommendations.
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a body form with radial symmetry is most likely found in
The echinoderms and cnidarians (which include jellyfish, sea anemones, and coral) have radial symmetry (such as sea urchins, brittle stars, and sea stars).
How common is radial symmetry in animals?She emphasizes that not all creatures have bilateral symmetry. Some creatures, like starfish, jellyfish, and sea urchins, have radial symmetry with four or five axes. The sponge is the only animal on Earth that lacks any kind of symmetry.
How do you define radial body symmetry?In radial symmetry, the body typically takes the shape of a short or long cylinder or bowl with a central axis along which the body parts are placed in a regular pattern or radiate out.
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you are working in a virology lab and help test incoming viral samples to determine the group of viruses to which they belong. viruses are characterized by their genome ds-dna, ss-dna, ds-rna, ss-rna (where ds stands for double stranded and ss for single stranded). 3 viruses have arrived for your analysis, eppstein-barr virus, a rotavirus, and an unknown virus from birds. you have analyzed the nucleic acid content as seen below. based on the data, what type of virus is each one (ds-dna, ss-dna, ds-rna, ss-rna; 3pts)?
what are genome of viruses?
Viruses typically have a single-stranded or double-stranded DNA or RNA genome, with sizes ranging from a few kilo bases to several hundred kilo bases. The genome can be linear or circular, and can encode anywhere from a few genes to several thousand genes. Depending on the virus, the genome can encode proteins involved in viral replication, proteins involved in viral structure, and proteins that are used to infect host cells.
The virus mentioned above with their genome are:
Epstein-Barr Virus: DS-DNA; Epstein-Barr Virus is a double stranded DNA virus that contains linear double stranded DNA.
Rotavirus: DS-RNA; Rotavirus is a double stranded RNA virus that contains 11 segments of double stranded RNA.
Unknown Virus from Birds: SS-RNA; The unknown virus from birds is most likely a single stranded RNA virus because most viruses from birds are RNA viruses, and single stranded RNA viruses are more common than double stranded RNA viruses.
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during photosynthesis, plants, algae, and certain bacteria remove co2 from the air and fix it into chemical compounds such as .
During photosynthesis, plants, algae, and certain bacteria remove CO2 from the air and fix it into chemical compounds such as glucose.
The process of photosynthesisPhotosynthesis is the process to convert light energy into chemical energy. Specifically, this process requires sunlight, water, and carbon dioxide to form oxygen and chemical energy stored in sugar. Besides that, it requires pigment to capture the sunlight.
Photosynthesis takes place in the plant, algae, and certain bacteria which have the pigment.
Along with photosynthesis, plants take in carbon dioxide (CO2) via stomata and water (H2O) through the xylem. Within the mesophyll cell, the water is oxidized (loses electrons) while the carbon dioxide is reduced (gains electrons). This process transforms the water into oxygen and the carbon dioxide into glucose. The glucose will be stored and oxygen will be released into the air.
Thus, the chemical compound produced from photosynthesis is glucose.
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list five ways in which scientists study and manipulate dna
The five ways in which scientists study and manipulate dna are
1) restriction enzymes, 2) gel electrophoresis, 3) restriction maps, 4) recombination, 5) Polymerase chain reaction
Deoxyribonucleic acid, also known as DNA, is the molecule that carries the genetic material necessary for an organism's growth and operation. The structure of DNA is a double helix, which is made up of two connected strands that loop around one another to resemble a twisted ladder. Deoxyribose and phosphate groups alternately form the backbone of each strand. One of the four bases—adenine (A), cytosine (C), guanine (G), or thymine—is joined to each sugar (T). Adenine forms chemical bonds with thymine while cytosine forms chemical bonds with guanine to join the two strands together. A protein or RNA molecule's construction instructions are among the biological information encoded by the nucleotide sequence along the DNA backbone.
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I’m writing a debate paper in my biology class about why we should NOT make another nuclear power plant. Extra points to anyone who can write me a strong closing paragraph including the points I used in my opening paragraph!<3 (screenshot of opening paragraph included!!)
We should NOT make another nuclear power plant because Nuclear energy forms radioactive waste.
What are the adverse effect of Nuclear power plant?An environmental concern related to nuclear power is the formation of radioactive wastes for example uranium mill tailings, spent reactor fuel, and other radioactive wastes etc. These substances can present radioactive and dangerous to human health for years.
Barriers and risks related with an more use of nuclear energy include operational risks and the safety concerns, uranium mining risks, regulatory risks, unresolved waste management issues, nuclear weapons proliferation concerns, and public opinion.
so we can conclude that radioactive waste is produced due to Nuclear energy.
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WILL GIVE BRAINLIST 2 BEST ANSWER
Complete the chart to show the presence of each gene in each organism, or paste a copy of the completed table from the notebook
The organism and the gene present in the organism are given below:
Ray-finned fish - And-1Cartilaginous fish - And-1Frog - And-2Chicken - And-2Lungfish - And-1Coelacanth - And-1What are genes?A gene is the basic structural and operational component of heredity. DNA is the component of genes. Some genes serve as blueprints for the synthesis of proteins. Many genes do not, however, code for proteins. A few hundred DNA bases to more than 2 million bases make up a gene in a human.
The And-1 gene is a gene present in fishes that makes proteins for cartilage and fins
The And-2 gene is present in frogs and chickens.
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the ancestor of the animal clade was probably a(n) colonial flagellated protist. triploblastic acoelomate with spiral cleavage. ciliated protist. amoeba. ctenophore.
The ancestor of the animal clade was probably a)Colonial Flagellated Protist. So,correct option is a.
Protists are eukaryotic organisms that are probably neither animals nor fungi or plants. Protists are not known to form any natural group or clade.
Colonial Protists are the multicellular organisms that sustain by forming large colonies. However Protists also use either the flagella or the cilia for their easy locomotion.
According to a stated hypothesis all the animals evolved from colonial Flagellated protists. Colonial Protists are different from symbiosis in which organisms provide each other mutual benefits by living together. Hence, as protists emerge as a completely different class, the ancestor of the animal clade was probably a Colonial Flagellated protist.
Hence,correct option is a.
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(Complete question) is:
the ancestor of the animal clade was probably
a)colonial flagellated protist.
b)triploblastic acoelomate with spiral cleavage.
c)ciliated protist. d)amoeba. ctenophore.
in pea plants, axial flowers are dominant to terminal flowers. what is the expected phenotypic ratio of a cross between two pea plants that are heterozygous for the axial flower gene? multiple choice question.
3 axial : 1 terminal, is the expected phenotypic ratio of a cross between two pea plants that are heterozygous for the axel flower gene.
What are heterozygous plants?
Heterozygous plants are plants that have two different alleles for a trait. They usually have one dominant allele and one recessive allele, so they express a mixture of traits. For example, if two plants are both heterozygous for flower colour, one with a red allele and one with a white allele, then the offspring of the two plants will be red and white flowers.
Axial flowers are dominant to terminal flowers, so when two pea plants that are heterozygous for the axial flower gene are crossed, the expected phenotypic ratio of the offspring will be 3 axial flowers to 1 terminal flower. This is because the dominant allele (axial flower) is expressed in the heterozygous offspring, while the recessive allele (terminal flower) is only expressed in the homozygous recessive offspring.
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genes establish a potential of expression, and environment determines where a person's phenotype will fall. this boundary of genetic influence is referred to as .
Reaction range refers to a concept that stated the phenotype that exist in organisms' genetic material would be adapted to the environment around them.
For example, birds that born in colder environment typically have thicker feather that can help to protect them from the harsh cold temperature compared to the birds that were born in warmer climate.
Environmental factors such as diet, temperature, oxygen levels, humidity, light cycles, and the presence of mutagens can all impact which of an animal's genes are expressed, which ultimately affects the animal's phenotype.
Phenotype is the observable physical or biochemical characteristics of an individual organism, determined by both genetic make-up and environmental influences, for example, height, weight and skin colour.
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Fill in the blank with: maple, cedar, mango, elm, pine. deciduous trees lose their leaves seasonally and include trees such as ____ and _____.
Deciduous trees lose their leaves seasonally and include trees such as Maple and Elm.
In the fields of horticulture and botany, the term deciduous refers to trees and shrubs that seasonally shed leaves, typically in the fall, the shedding of flower petals after blooming, and the shedding of ripe fruit. It also means "falling off at maturity" and "tending to fall off". Evergreen is the opposite of deciduous in a botanical sense.
Generally speaking, the term "deciduous" refers to the "falling away when its purpose is accomplished" and the "dropping of a part that is no longer needed or helpful." It is the outcome of organic processes in plants.
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Some species of animals and plants are currently responding to climate change by extending their range into new territories.a. trueb. false
The given statement, "Some species of animals and plants are responding to climate change by extending their range into the new territories" is true.
Species belong to the lowest level in the hierarchy of classification of organisms. The members of a species comprise of similar characteristics and morphology. The members of a species are naturally able to reproduce among themselves.
Climate change is the change in the temperatures and weather of a region which occurs over long-term range. These changes are mainly caused due to human activities that have disturbed the normal cycle of the environment. It has altered the life of living organism like their habitats, feeding habits, etc.
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Which organelle will use oxygen and give off carbon dioxide and water?
The organelle that will use oxygen and give water and carbon dioxide is the mitochondria.
The mitochondria is an organelle that can be found in eukaryotic cells. The primary function of this organelle is to carry out cellular respiration in order to generate ATP (energy). That means that mitochondria will use oxygen in order to do the respiration process, which gives out water and carbon dioxide and the byproducts.
Mitochondria are generally found in oval-ish shape. Aside from producing energy, this organelle is also used to store calcium, generate heat, and mediate cell growth and death.
Attached below is an image that shows two mitochondria from a mammal's lung tissue.
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Which one will swing faster?
A- they will go the same speed
B- 1 is faster
C- 2 is faster
ADD EXPLANATION
The swing that will move faster is 2. The correct option is c. 2 is faster.
What is a pendulum?A body suspended from a fixed point and capable of swinging back and forth in response to the pull of gravity is referred to as a pendulum. Because the periods, or the length of time between each full oscillation, are consistent, pendulums are used to regulate clock movement.
The formula for calculating this would of a pendulum is T = 2 Square root of L/g, where L is the pendulum's duration and g is its gravitational acceleration.
Therefore, the correct option is C- 2 is faster.
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