When Darwin returned to England aboard the HMS Beagle after his voyage to the Galapagos Islands, he used artificial selection to help gather data to justify his theory of evolution. After studying the finches on the islands, Darwin moved to raising birds, notably pigeons, back home to test his theories.
What, according to Darwin, is artificial selection?Artificial selection is the discovery of desirable qualities in plants and animals by humans, as well as the procedures taken to improve and maintain such traits in future generations.
They may adjust an organism's properties by choosing which creatures were permitted to reproduce. . Darwin referred to this form of alteration in organisms as artificial selection.
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Contains digestive enzymes that break down old cell parts
Lysosome Digestive enzymes are used to digest food and break down materials in the cell that are damaged or old to recycle the raw materials.
The organelles that contain the digestive enzymes that break down the waste material and the debris in the cell in a cell are called as lysosomes. Lysosomes are the membrane-bound structures that will release the digestive enzymes onto the debris and waste materials into the cell to recycle the components of these structures. Lysosomes are membrane-enclosed organelles that contain an array of the enzymes capable of breaking down all the types of biological polymers—proteins, the nucleic acids, the carbohydrates, and lipids.
The question is all incomplete the complete question is:
Which organelles that contain digestive enzymes that break down the waste material and debris in a cell?
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The replication of dna is made possible by the presence of _____ strands in the double helix of dna.
The replication of DNA is made possible by the presence of Complementary strands in the double helix of DNA.
Why is replication is important ?Replication is an essential process because, whenever a cell divides ,the two new daughter cells must contain the same genetic information or DNA as the parent cell. The replication process relies on the fact that each strand of DNA can serve as a template for duplication.
Complementary DNA is a copy of a region of a strand of DNA.
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Which disease is caused by a bacteria that resides in the soil, can create spores under certain environmental conditions, and is primarily a disease of animals?
Anthrax is a bacteria that resides in the soil, can create spores under certain environmental conditions and is primarily a disease of animals.
Anthrax is an infectious disease most commonly found in cattle, sheep, and goats. It is transmitted by feed or water with spores and the symptoms start to occur after 7 to 8 days.
These infections enter through cuts or abrasions on the skin. At first, a bump appears on the skin and then a 3-centimeter wide ulcer. Humans can also contract anthrax if they stay in constant touch with infected animals.
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Which species concept might differentiate species on the basis of specific dietary requirements?
a) morphospecies concept
b) phylogenetic species
c) concept ecological
d) species concept
The correct option is (c) Concept ecological
Ecological species concept might differentiate species on the basis of specific dietary requirements.
What is ecological species concept?According to the ecological species idea, a species is a group of organisms that have adapted to a specific environment resource set, also known as a niche. This idea holds that populations tend to develop the discrete phenetic groupings that we identify as species as a result of the ecological and evolutionary processes governing how resources are distributed. Numerous studies in ecology, particularly those involving closely related species residing in the same region, have shown that variations in a species' shape or behavior are frequently tied to variations in the natural resources those species use.Learn more about the ecological species concept with the help of the given link:
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In addition to transporting oxygen from the lungs to the tissues, hemoglobin is also involved in transporting carbon dioxide from the tissues to the lungs. how is this accomplished?
The correct option is (C) Carbon dioxide reacts with an amino group to stabilize the deoxyhemoglobin state.
In addition to transporting oxygen from the lungs to the tissues, hemoglobin is also involved in transporting carbon dioxide from the tissues to the lungs where, Carbon dioxide reacts with an amino group to stabilize the deoxyhemoglobin state.
How does hemoglobin contribute to the movement of carbon dioxide from the tissues to the lungs?The transport of carbon dioxide in the blood is influenced by a number of factors. First, blood contains more carbon dioxide soluble molecules than oxygen. The plasma contains 5–7% of the total dissolved carbon dioxide. Second, carbon dioxide can enter red blood cells and bind to hemoglobin or it can bind to plasma proteins. In this form, 10% of the carbon dioxide gets transported. A substance known as carbaminohemoglobin is created when carbon dioxide binds to hemoglobin. Hemoglobin and carbon dioxide can bind to one other again. As a result, when it gets to the lungs, the carbon dioxide can separate from the hemoglobin without restriction and leave the body.Third, the bicarbonate buffer system is responsible for transporting 85% of the carbon dioxide molecules.Learn more about the CO₂ transfer with the help of the given link:
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I understand that the question you are looking for is "In addition to transporting oxygen from the lungs to the tissues, hemoglobin is also involved in transporting carbon dioxide from the tissues to the lungs. How is this accomplished?
A. Carbon dioxide competes for the oxygen-binding site on the heme.
B. Carbon dioxide competes for the 2,3-BPG-binding site.
C. Carbon dioxide reacts with an amino group to stabilize the deoxyhemoglobin state.
D. Carbon dioxide binds to the carboxyl terminus of hemoglobin."
what implication can be made about the mortality rate of the bacteria if antibiotics are added to an environment with both types of bacteria? Explain
Upon entering the environment, antibiotic residues can harm human health and the biota at various trophic levels by contaminating food and water, contributing to the growth of resistant bacteria, and maintaining the selective pressure that leads to the development and/or spread of resistance in various environmental compartments.
Antibiotic residues may interfere with physiological processes and have possible ecotoxicological effects on plants, in addition to the possibility of promoting microbial antibiotic resistance.
The influence of antibiotics on photosynthesis (chloroplast gene expression, cell proliferation, and oxidative stress response in plants) and mitochondria (oxidative stress response in plants) was revealed by several chronic and acute toxicity studies, which were conducted to highlight the detrimental effects. This impact is likely explained by the bacterial origins of chloroplasts and mitochondria.
Antibiotic concentrations in agricultural soils have the potential to slow germination or lower biomass, which could have a negative impact on the output of farms fertilized with contaminated manure. The human microbiome can be altered by antibiotic residues, which can also lead to health issues such allergic reactions, chronic toxic effects from extended exposure, and disruptions of digestive system processes.
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Identify the reasons why meiosis leads to significant genetic variation while mitosis does not. select the two correct reasons.
Please be rightly informed that meiosis leads to significant genetic variation while mitosis does not simply because
Meiosis produce chromosomes and crossing over provide a large amount of genetic variation.Meiosis produces a unique combination of genes.Option b and c are the two correct answer
This is possible simply because there is an independent assortment of the genetic materials which contains a unique and different combination of genes
What is cell division?Living organisms be it plants or animals need to produce new cells for replacement, growth and development and other life processes, the process by which all these occur is known as cell division.
However, the functions and importance of cell division cannot be overemphasized as it helps greatly in
Formation of gamatesReproductionGrowth formation.So therefore, meiosis leads to significant genetic variation while mitosis does not simply because
Meiosis produce chromosomes and crossing over provide a large amount of genetic variation.Meiosis produces a unique combination of genes.Complete question:
Identify the reasons why meiosis leads to significant genetic variation while mitosis does not. select the two correct reasons.
a. Meiosis produces the same combination of genes.
b. Meiosis produce chromosomes and crossing over provide a large amount of genetic variation.
c.Meiosis produces a unique combination of genes.
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______encourage the growth of good bacteria in the large intestines and an example of a good bacteria is _________________.
Probiotics encourage the growth of good bacteria in the large intestine and an example of a good bacteria is bifidobacteria.
Probiotics are the living microorganisms found in food items like yogurt and other fermented foods. Lactobacillus and Bifidobacterium are the two most common bacteria that belong to this group. Probiotics have a desirable healthy effect on your body. It helps the community of microorganisms in the body to grow healthier and strengthen the immune system.
Probiotics can help prevent antibiotic-associated diarrhea, necrotizing enterocolitis, sepsis, periodontal disease, and ulcerative colitis. Probiotics are even more helpful in various other health conditions like allergies, acne, dental disorders, etc.
Chocolates, yogurt, cheese, beer, kimchi, bread, buttermilk, etc are some food items that contain good bacteria for probiotics. Some more examples of probiotics include streptococcus thermophilus, Saccharomyces boulardii, etc.
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The perception of food by visual or taste senses causes the liberation of one hormone in the stomach, which one is that hormone?
The perception of food by visual or taste senses causes the liberation of one hormone in the stomach, which is gastrin hormone.
Hormones are the chemical messengers that are release by an organ or gland and their site if action is some other part of the body. Hormones regulate several processes of the body like regulating the physiological processes or maintaining homeostasis.
Gastrin hormone is secreted by the G-cells present in the lining of the stomach. It stimulates the stomach to secrete more of hydrochloric acid. It also promotes the growth of mucosa is the stomach. Gastrin is also known for regulating blood pressure.
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Which term refers to a muscle that shares the same action as another muscle at the same joint?
Synergist is the term refers to a muscle that shares the same action as another muscle at the same joint
What do you call paired muscles?These types of muscles are referred to as antagonistic pairs. When two muscles are antagonistic, the lengthening or relaxing of one muscle causes the other to relax. The term "agonist" refers to the muscle that is contracting, while "antagonist" refers to the muscle that is relaxing or extending.
Synergistic muscles are sets of muscles that cooperate to produce a single action. Antagonistic muscles are those that oppose one another. Movement requires an antagonist muscle to counteract the action of an agonist muscle.
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Which process of molecule transport would occur when a patient develops pedal edema?
Answer:
Osmosis of molecule transport would occur when a patient develops pedal edema.
Explanation:
An abnormal buildup of fluids inside the ankles, foot, and lower legs known as pedal edema causes inflammation inside the ankles as well as feet. There are two things that might make the feet swollen. Increased capillary leaking from the venous system can affect fluid to flow into the interstitium, resulting in venous edema. A person having hypertension and developing pedal edema owing to too much salt in the blood does have a blood pressure around 160/90 mm Hg. Water begins to flow down the gradient as a result. As a result, osmotic pressure causes the water within blood vessels to migrate between higher concentrations toward lower amounts all across semipermeable, which causes water to accumulate in extracellular spaces. This process is known as osmosis.
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The major commercial species of nicotiana is _________blank, which is a large-leaf species grown in more than a hundred counties.
The major commercial species of nicotiana is Nicotiana tobacum, which is a large-leaf species grown in more than a hundred counties.
What is Nicotania tobacum?
An annual herbaceous plant of the Nicotiana genus, Nicotiana tabacum, sometimes known as cultivated tobacco, is grown. The plant, which has a tropical origin and is widely cultivated around the world, is quite common. It can reach heights of 1 to 2 meters (3 to 6 feet). The leaves of this plant are commercially produced and used to make tobacco, making it the most widely cultivated of all the species in the genus Nicotiana. It has been established that cellulose and other naturally occurring tobacco polysaccharides are the main sources of acetaldehyde in tobacco smoke. Rutin and chlorogenic acid make up the majority of the polyphenols found in tobacco leaves. There are glutamic acids, asparagine, glutamine, and -aminobutyric acid among the amino acids present.Learn more about the Tobacco with the help of the given link:
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The scientist who formulated the three laws of planetary motion by analyzing the data on the precise location of planets in the sky was:________
The scientist who formulated the three laws of planetary motion by analyzing the data on the precise location of planets in the sky was: Johannes Kepler
What was the finding of Johann Kepler?German mathematician and astronomer Johannes Kepler made the discovery that the Earth and planets had elliptical orbits around the sun. He listed the three guiding principles of planetary motion.
Planets circle the sun in an elliptical pattern, which is explained by Kepler's first rule, sometimes known as the law of ellipses. A pencil, two tacks, a rope, a sheet of paper, and a piece of cardboard may all be used to create an ellipse.
According to Kepler's second rule, a planet travels in its orbit so that a line drawn between it and the Sun and focused on it covers the same amount of space in the same amount of time.
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Select the correct answer.
which activity provides the greatest reduction to the risk of disease-causing pathogens?
a. laundering with cold water
b. dusting
c. mopping the floor with water and disinfectant
d. polishing furniture
e. sorting laundry
which activity provides the greatest reduction to the risk of disease-causing pathogens?
a. laundering with cold water
b. dusting
c. mopping the floor with water and disinfectant
d. polishing furniture
e. sorting laundry
What is disease-causing pathogens?
Pathogens, often known as infectious or pathogenic diseases, include bacteria, viruses, fungi, and parasites. These pathogens can be present in the soil, water, and air, and contamination can result through touching, ingesting, or drinking something that has a germ on it.
Option C is the correct choice.
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The universal donor of rbcs, but not necessarily plasma, is blood type __________.
The universal donor of rbcs, but not necessarily plasma, is blood type O positive
If you have type O blood, you can only get type O red blood cell transfusions. But you can give your red blood cells to people with type A, B, AB, or O blood, which is why you are sometimes called a universal donor.
What is Blood group ?According to the presence or absence of antibodies and hereditary antigenic compounds on the surface of red blood cells, blood is classified according to its type. Depending on the blood group system, these antigens could be proteins, carbohydrates, glycoproteins, or glycolipids.
The four main blood types (groups) are A, B, AB, and O. The genes you inherited from your parents define your blood type. There are a total of 8 blood types, each of which can be either RhD positive or RhD negative.Learn more about Blood group here:
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The inability to recognize familiar faces even though one can clearly see and describe features of the faces is associated with damage to the right ________ lobe.
A. frontal
B. parietal
C. occipital
D. temporal
Anything that can perform life processes by itself is a/an
Answer:
an organism
Explanation:
Anything that can perform life processes by itself is an organism. An organism made of a single cell is called a unicellular organism.
The term used to describe the process in which foods are broken down into their component molecules is?
Answer:
Chemical digestion
Explanation:
This process is known as chemical digestion, where water and digestive enzymes are used to break down the molecules.
AHH HELP OMG :') Which of the following sets of features are adaptations to overcome the buoyancy aspect of the aquatic problem? Pick the best possible answer.
Tapetum lucidum, echolocation, electroreception
Caudal fluke, enlarged flippers, flattened tail
Insulation, repellant oil, altered metabolism
O Pachyostosis, osteosclerosis, gastroliths
Answer:
The second option
Explanation:
What happens if you are following the scientific method and after your experiment, your hypothesis is found to be incorrect?
A. you should give up on the problem because you got the answer wrong
B. you should think of a new question to study
C. you should make an observation
D. you should refine, alter, expand or reject your hypothesis and then develop a new prediction
Answer:
D
Explanation:
Don't give up! Keep trying to make a correct hypothesis.
Answer:
I took the test and it was “D”
Explanation:
I also put some pics below with things that could help out a bit in the future.
What is one of the simplest checks for overall mobility, and is commonly used by usa weightlifting for athlete preparation, and to test readiness for the snatch specifically?
Apley's test ,Toe touch test Overhead squat Sit and reach flexibility test 66.The Apley scratch take a look at is a shoulder flexibility, used to assess the power and mobility of your shoulder joint. The also can be used to evaluate the variety of motion (ROM) of your shoulder, inclusive of flexion and extension.The Apley returned scratch particularly assessments the mobility of your shoulders. The intention of the shoulder flexibility take a look at is to save you hyperextension of the joint.
Hyperextension can cause an acute or continual damage of the rotator cuff muscle group, inclusive of supraspinatus, infraspinatus, teres minor, and subscapularis. These rotator cuff accidents may be due to repetitive movements, including the ones worried with swimming, tennis, volleyball, racquetball, or any game that calls for throwing or catching.1
Monitoring assessments are normally used to evaluate weightlifter’s preparedness for competition. Although diverse tracking assessments were used, it isn't always clean which take a look at is the most powerful indicator of weightlifting performance.
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Which characteristic of a phospholipid contributes to the fluidity of the membrane?
The characteristic of a phospholipid that contributes to the fluidity of the membrane is the unsaturation of lipids.
Phospholipid is the most common type of lipid present in the plasma membrane. It contains the phosphate group in its polar head. The phospholipids that are present in the membrane are: phosphatidylcholine, phosphatidylethanolamine, phosphatidylserine, and sphingomyelin.
Unsaturation of lipids is the presence of double bonds in the fatty acid chain. One of the fatty acid chain is unsaturated while the other is saturated. This gives a kink in the lipid structure. This kink prevents the tight packing of the lipid in the plasma membrane, thereby contributing in its fluidity.
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Which enzyme is responsible for adding complementary dna bases to an exposed dna strand?
a) dna helicase
b) dna polymerase
c) dna ligase
d) dna peptidase
The correct option is (b) DNA polymerase.
DNA polymerase is responsible for adding complementary dna bases to an exposed dna strand.
What is the function of DNA plymerase?The family of enzymes that catalyze the synthesis of DNA molecules from nucleoside triphosphates, the basic building blocks of DNA, includes DNA polymerase. These enzymes, which are required for DNA replication, typically function in groups to divide an initial DNA duplex into two identical copies. DNA polymerase "reads" the preexisting DNA strands throughout this process to produce two new strands that are identical to the preexisting ones. One nucleotide at a time, DNA polymerase adds nucleotides to the three prime (3')-end of a DNA strand. DNA polymerases are necessary to replicate the cell's DNA during cell division in order for a copy of the original DNA molecule to be transferred to each daughter cell.Learn more about the Replication with the help of the given link:
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Which musculoskeletal abnormality would the nurse suspect in a client who exhibits short steps and drags a foot?
Spastic gait is the musculoskeletal abnormality in which the client exhibits short steps and drags a foot.
What is spastic gait?The legs are stiff and bounce during a spastic gait or walk, and the feet have a propensity to circumduct and scuff. In extreme cases, increasing adductor tone can cause the legs to cross. Shoes frequently display an uneven worn pattern on the outside.
The typical clinical appearance of a spastic hemiparesis is an arm that is adducted, internally rotated at the shoulder, flexed at the elbow, with pronation of the forearm and flexion of the wrist and fingers. This is caused by spasticity of the arm and leg on one side. The foot is plantarflexed and inverted, and the leg is slightly flexed at the hip and stretched at the knee.
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The developmental occurrences you used to determine age stopped at age 25. What are other clues a forensic anthropologist may be able to use to determine age if the bones belong to a person over age 25?.
People over 25 have wear and tear on their bones. This is one of the other clues that a forensic anthropologist may be able to use to determine age if the bones belong to a person over age 25.
Cartilage would become worn down, and as a person ages, their bones would become more brittle and prone to fracture. A forensic anthropologist can estimate the age of a sub-adult skeleton by looking at the teeth and jaw.
The epiphyseal fusion and skull sutures found in the skeleton of young adults, however, can be used to conduct a comparative examination. The zigzag "seams" that connect the skull's bones are called sutures. Ectocranial suture analysis is less trustworthy as a method of aging than endocranial suture analysis (within the skull).
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Which type of fracture involves a break through only part of the cross-section of the bone?
A type of fracture that involves a break through only part of the cross-section of the bone is called an incomplete fracture.
A fracture is an incomplete or complete break in the continuity of the bone structure. When a bone is subjected to great stress, more than it can absorb, it breaks, resulting in a fracture.
When only part of the bone gets cracked or broken it is called an incomplete fracture. Other types of fractures include:
Complete fracture: this is a breakthrough the whole cross-section of the bone. Closed fracture: in this type of fracture does not result in a tearing or opening of the skin.Open fracture: this occurs when a fracture results in the opening or breaking of the skin.Learn more about fractures here:
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Changes in the biological system is most likely to cause changes in the ________.
Changes in the biological system is most likely to cause changes in the Psychological and societal systems
What is psychosocial conflict?Erikson believed that these conflicts were caused by either failing to develop a psychological characteristic or succeeding in doing so. The potential for personal development is greatest at these periods, but failure is also a real possibility.
Individuals organise and interpret their sensory perceptions through the process of perception in order to give their surroundings meaning.
The term "psychosocial development" simply refers to how a person's own needs (psycho) interact with societal expectations (social). A human goes through eight developmental phases, each of which builds on the one before it, in accordance with Erikson. We encounter a problem at every step.
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The chief inhibitory neurotransmitter in the brain is ____, and the chief excitatory neurotransmitter is ____.
The chief inhibitory neurotransmitter in the brain is GABA and the chief excitatory neurotransmitter is Glutamate.
Gamma-aminobutyric acid (GABA) is an amino acid that serves as the central nervous system's main inhibitory neurotransmitter (CNS). By preventing nerve transmission, it works to lower neuronal excitability. When GABA attaches to the GABA receptor protein in your brain, it exerts a relaxing effect. Anxiety, worry, and fear can all be relieved with the use of this. The most prevalent excitatory neurotransmitter in the brain and central nervous system is glutamate. You require it to maintain optimal brain function. Glutamate has a significant impact on how learning and memory are shaped. Glutamate must be present at the proper concentrations, locations, and times.
The main distinction between glutamate and GABA is that L-glutamic acid decarboxylase produces GABA from glutamate.
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A new drug is developed that inhibits formation of the flagellar filament by impairing production of the protein flagellin. is this going to be a good drug?
A new drug being developed that inhibits formation of the flagellar filament by impairing production of the protein flagellin can be useful for the pathogens that use flagella as the means of movement, but the drug would not be effective against those pathogens that do not use flagella.
Flagella is the motility structure present in various living organisms. It is a thin, slender, thread-like structure. There are a few structural differences in the prokaryotic and eukaryotic flagella. Eukaryotes can have various flagella in a cell, but prokaryotes generally have one.
The protein flagellin is present in the prokaryotic flagella. The structure of the protein is globular that arranges itself in a cylinder-like manner inside the flagella.
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Strong epidemiologic evidence that cigarette smoking was a major case of heart disease existed long before there was any biological evidence. True or false
Answer:
Strong epidemiologic evidence that cigarette smoking was a major case of heart disease existed long before there was any biological evidence is true.
Explanation:
According to a report which was presented in 2014 on cigarettes and health, smoking is a significant factor in cardiovascular disease (CVD), also it accounts for around one in four fatalities due to CVD. CVD is the most common kind of over 800,000 individuals die from this cause in the US every year. Heart disease affects more than 16 million people in the US. Nearly 8 million people used to have a stroke, while 7 million people suffered a heart attack. Smokers who consume less than five cigarettes per day may still display signs of earliest CVD The more cigarettes smoked, the higher the risk of CVD. daily and for an extended period of time. having a cigarette with reduced amounts of tar or nicotine did not lower the risk for cardiovascular disease.
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