One of the primary advantages of cell culture is the ability to isolate a single type of cell from a multicellular organism. How has this advance changed the study of biology?
Single-type cultures are easier and cheaper to maintain than cultures made of mixed cell types.
Scientists can completely avoid using animal or human test subjects during their experiments.
Cultures with single cell types behave in culture exactly as they would behave in a tissue or organ.
Scientists know that any response during an experiment is associated only with that cell type.
Answers
Answer:
Scientists know that any response during an experiment is associated only with that cell type.
Explanation:
A cell culture is a group of cells that develops from a single original cell. Biologists can use cell cultures to test cell responses under controlled environmental conditions in order to study interactions between cells, and different processes occurs in it. Cell culture is one of the major tools used in the study of physiology and effect of toxic substances on the cells.
Answer: The answer is D.
Explanation:
Related Questions
How .....................................................................................................................
Answers
Answer:
how? what do you mean
Explanation:
how what :)gl
Answer:
um how what?
Explanation:
Which statement best describes the relationship between cells, DNA, and proteins? * 1 point A) Cells contain DNA that controls the production of proteins. B) DNA is composed of proteins that carry coded information for how cells function. C) Proteins are used to produce cells that link amino acids together into DNA. D) Cells are linked together by proteins to make different kinds of DNA molecules
Answers
Answer:
It's going to be A
Explanation:
DNA has instruction in it on how to do protein synthesis.
The fertilization of ovules from Plant Q by pollen from Plant R results in the production of seeds. What percent of the genes in each offspring's chloroplasts will have been inherited from plant R?
A: 0%
B: 25%
C: 50%
D: 100%
Answers
Answer:
The correct answer is - option A. 0%
Explanation:
The zygote formation or fertilization in flowering plants occurs by the fusion of pollen of one plant with the ovum of another plant of the same species normally. This process includes the exchange of an equal amount of the genetic contribution from both plants.
The egg cell of the mother is responsible for the mitochondria and chloroplast of the progeny so the percentage of chloroplast genes provided via Plant R is 0% as ovum and egg cell comes from only plant Q.
percentage of chloroplast gene inherited from R plant is a)0%
Question 4
Place the following in correct developmental sequence:
1. reticulocyte
2. Proerythroblast
3. hemocytoblast
4. erythroblast
3.2.4.1.
3.1.4.2.
2.3.4.1.
2.1.3.4.
Answers
.3.1.4.2
-3. hemocytoblast
-1. reticulocyte
-4. erythroblast
-2. Proerythroblast
is the human population growth also a factor. for. causing deforestation? justify your answer giving reason
Answers
Answer:
Population growth, combined with other direct factors such as poverty, corruption, and weak property rights, contributes to forest loss and severe environmental degradation. Demand for forest and agricultural products to feed growing rural and urban populations will continue to put pressure on forests.
Explanation:
Guess why most leaves are wide and thin.
Answers
Answer:
Due to their broad surface areas, green leaves can absorb more sunlight at a given time, and due to the thinness of the leaves, the light energy can easily penetrate the leaf surface and be trapped by the chloroplasts. This makes photosynthesis efficient. Therefore, green leaves are thin and broad.
Explanation:
Hope this helps you......
In humans, dimples (D) are dominant over no dimples (d). Curly hair (A) is dominant over
straight hair (a). Paul, who is heterozygous for dimples and curly hair, marries Jane, who
has curly hair but does not have dimples. Jane's mother had straight hair, but her father had
curly hair. Paul and Jane had a child named Peter, who had curly hair but did not have
dimples.
Answers
Answer:
1. ddaa
2. DdAa
3. One from each parent
4. False
5. 0.25
6. 0.25
7. 0.25
8. 0.5
Explanation:
The remaining part of the question is
1. What is Jane's genotype?
2. What is Paul’s genotype?
3. Where did Jane get her gene for curly hair? From her mother or father?
4. True or False: Jane's mother was heterozygous for curly hair?
5. What fraction of Paul and Jane's children should have curly hair and dimples?
6. What fraction of their children would have straight hair and no dimples?
7. What fraction should have dimples but not curly hair?
8. What is the probability of getting any offspring with dimples
Solution
1. Genotype of Jane's mother -ddaa
2. Genotype of Paul (heterozygous for dimples and curly hair) – DdAa
3. One “a” gene from mother (whose genotype for hair was aa) and second “a”gene from father (whose genotype was Aa)
4. False. She was having straight hair
5. Offspring of Paul and Jane
DdAa (4), Ddaa (4), ddAa(4) and ddaa (4)
4 out of 16 offspring will have curly hair and dimples = 0.25
6. ddaa, 4/16 = 0.25
7. Ddaa , 4/16 = 0.25
8. Ddaa, DdAa, 8/16 = 0.5
The use of DNA in the process of classifying organisms is known as
Answers
Answer:
The field of genetics involves the study of genes, segments of DNA that code for specific traits, behaviors, or other characteristics of organisms. ... By studying genetics and DNA, we can get the best idea of how species are related to each other, and therefore how to classify them.
The field of genetics involves the use of DNA in the process of classifying organisms.
What is genetics?Genetics is the scientific study of genes and heredity and how certain characteristics are handed down from parents to offspring as a response to changes in DNA sequence.
A gene is a segment of DNA that contains instructions for constructing one or more molecules that aid in the functioning of the body.
Thus, the field of genetics involves the use of DNA in the process of classifying organisms.
For more details regarding genetics, visit:
https://brainly.com/question/12985618
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When is genetic drift a major factor in evolution?
O A. When there is low gene flow
O B. When there is high selective pressure
O C. When there is sexual selection
O D. When there is female choice
Answers
Answer:look at pic
Explanation:
When there is high selective pressure is the major factor in evolution.
What is Genetic drift?Genetic drift is the arbitrary change in the population's frequency of a gene variant that already exists. Gene variations may totally vanish due to genetic drift, which would limit genetic diversity. Moreover, it can make previously uncommon alleles far more common and even fixed.
Genetic drift is an evolutionary process in which the frequency of a given gene allele varies randomly across a population.
The impacts of genetic drift can be severe, often causing traits to become excessively common or to vanish from a community, even though it predominantly affects small, isolated populations.
Therefore, When there is high selective pressure is the major factor in evolution.
To learn more about Genetic drift, refer to the link:
https://brainly.com/question/12985618
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If you wanted to study the effects of soil moisture and light intensity on the growth of soybeans and required a high ability to regulate these independent variables, what type of experiment would you choose?A. Laboratory experiment.
B. Field experiment.
C. Natural experiment.
D. Reference experiment.
Answers
Answer:
A
Explanation:
The correct answer would laboratory experiment.
In the laboratory, variables can be controlled as much as possible using relevant equipment unlike in natural habitats or field experiments. For example, the amount of water that each plant would receive can be measured using measuring cylinders and the time they are applied can also be fixed.
Field and natural experiments require that experimental procedures are carried out in the field under natural conditions. Consequently, variables such as the amount of moisture that gets into the soil or the amount of light a plant will receive will be extremely difficult to control. Precipitation time and the duration of light can also not be controlled.
The correct option is, therefore, A.
What would happen to a resting skeletal muscle if the
sarcolemma suddenly became very permeable to calcium
ions?
Answers
Answer:
akoto sacaculocome cac
1.Organisms without a distinct nucleus
2 .Structures that display characteristics of living organisms only
within living cells
3. The close association between two organisms where one or both
benefit muclism
4. Disease caused by a virus that leads to a gradual destruction of th
mmune system
5. Process by which bacteria break organic matter into simple
utrients which are then returned to the so
A term used to describe organisms that cause diseases e.g. bacteria
Answers
2. Viruses
3. Commensalism
4. Acquired immunodeficiency syndrome (AIDS)
5. Decomposition
6. pathogen
how can fear be a barrier to help seeking
Answers
Explanation:
Fear is a barrier as people fear being judged for things as there might be a stigma attached to it. When people are judged their problem isn't solved and instead worsened and they will feel compelled to keep their problems to themselves.
List two adaptations of plant life in the tropical rain forest.
Answers
Answer:
Having their roots in the ground and climbing high into the tree canopy to reach available sunlight.
Lianas start life in the rainforest canopy and send roots down to the ground.
Explanation:
Lianas - these are woody vines that have roots in the ground but climb up the trees to reach the sunlight. Their leaves and flowers grow in the canopy.
Tree trunks - these are tall and thin to allow trees to reach the sunlight. The bark on these trees is smooth to allow water to flow down to the roots easily.
What is the main source of raw material for the production of plastics?
Answers
Answer:
Crude oil is the main source
Explanation:
hope it helps
Pls mark as brainlist
4 pic 1 word
what is the word?
Answers
Answer:
tree
Explanation:
Answer:
Life ?
Explanation:
The bottom right is a weird looking person but yea. Ain't no way that bottom right thingy is a tree !? I thought it was a human with wings
Which direction does blood flow in arteries?
Answers
it flows towards the heart
please do this. It is 100 points and im giving brainliest.
Answers
Answer:
pls see on book all answer see given
6. When an action potential reaches an axon's terminal it will
a. Trigger the release of neurotransmitters into the cleft
b. Cause voltage gated ion channels to open on the postsynaptic cell
c. Cause ligand-gated ion channels to open on the presynaptic neuron
Answers
Answer:
Cause voltage gated ion channels to open on the postsynaptic cell
Explanation:
Brainliest
The artery that will eventually subdivide to form the posterior cerebral arteries is the _____ artery.a) basilarb) external carotidc) maxillaryd) superficial temporale) nternal carotid
Answers
Answer:
a) basilar
Explanation:
The basilar artery is an artery whose function is to supply of blood to the brain and central nervous system, thereby transporting oxygenated blood to the brainstem, cerebellum, and occipital lobes for maintaining normal brain function. This artery is 3 to 4 mm in diameter. The basilar artery is formed from the confluence of two vertebral arteries inside the cranium at the level of the medulla. The posterior cerebral arteries are formed by the bifurcation of the basilar artery, and they supply oxygenated blood to the occipital lobes and posteromedial temporal lobes.
Light reactions occur inside of the thylakiod membranes and they produce oxygen, ATP, and NADP
True
False
Answers
Understanding the REDOX tower. Group of answer choices More negative E values mean: [ Choose ] More positive E values mean: [ Choose ] Compounds on the right side of the slash are: the reduced form of the compound Compounds on the left side of the slash are: the oxidized form of the compound Compounds at the top of the tower are more likely to: [ Choose ] Compounds on the bottom of the tower are more likely to:
Answers
Answer:
More negative E value means More likely to accept electrons.
More Positive E value means More likely to donate electrons.
Compounds on the right side of the slash are the reduced form of the compound.
Compounds on the left side of the slash are the oxidized form of the compound.
Explanation:
Redox tower is formed by reduction oxidation reaction which transfer of electrons happen between two species. It is a chemical reaction in which oxidation number of ions changes due to gain or loss of electron.
Redox reactions involves loss/gain of electrons.
A redox reaction equation is one in which a chemical specie either donates or accepts electrons. If the value of E is negative, the specie most likely donates electrons while a positive E shows that the specie readily accepts electrons.
The compound on the left side of the slash is oxidized while the one on the right side of the slash is reduced.
Learn more about redox reaction: https://brainly.com/question/13978139
pls help i really need it
Answers
Answer:
the awnser is b chickens live up to 18 months with there head cut off
Explanation:
Homework is due in 2 hours and i need help on this last question!
Which of the following could help reduce waste buildup in heavily populated areas?
A.
using washable dishes rather than disposable plates and utensils
B.
packing your lunch in a reusable bag instead of a paper bag
C.
recycling paper, plastics, metals, and glass
D.
all of these
Answers
Answer:
D
Explanation:
all.of the above because in heavy populated areas there is more waste so you would need tp do as much as pkssible to reduce the build up
The three main domain was identified by
Answers
Answer:
below
Explanation: Studies by Benjamin Bloom (on cognitive domain), David Krathwohl (affective domain) and Anita Harrow (Psychomotor domain) have been encompassed into the three domains of learning (Sousa, 2016)
Even though the idea of recycling materials and using them in other ways seems like a good idea, why is the idea of using recycled tires at playgrounds a concern for some scientists?
edge2021
Answers
Answer:
The idea of using recycle tires at playgrounds is a concern for some scientists because they contain carcinogenic substances.
Explanation:
Recycle tires are in playgrounds as rubber mulch. This one is on the playground's floor to cushion the impact of any falls that kids may have while playing. The problem with this product is that, as they are old tires cut into little pieces, they still have the tires' toxins such as arsenic, benzene, cadmium, mercury, etc. Exposure to these toxins can cause cancer. This is why some scientists are concerned with this material in areas where kids are exposed to it since they are more vulnerable to carcinogens than adults.
what are electromagnetic waves
Answers
Answer:
Electromagnetic waves are formed when an electric field comes in contact with a magnetic field. They are hence known as 'electromagnetic' waves.
Explanation:
Answer:
they are basically electromagnetic radiation which refers to the electromagnetic field. they propagate through space carrying electromagnetic radiant energy. they include radio waves, microwaves, infrared waves, light, ultraviolet, x-rays, and gamma rays.
URGENT PLZ ANSWER!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Which of the following qualify as acquired traits? [SELECT ALL THAT APPLY]
A) Eye color
B) Being muscular
C) Wearing glasses
D) Pierced ears
E) Eye color
F) Being a good public speaker
G) Left-handedness
Answers
Answer:
option b c f and g must bhe acquired traits
see the screenshot and answer the question
Answers
Diffusion is important as it allows substances to go into the cell to use for energy, growth and many other important processes that occur to support the cell. It also allows substances to leave the cell to get rid of waste products which is no longer required in the cells.
Take for instance, animals, a category that includes humans. We need diffusion in order to allow gas exchange to occur which aids us to respire. In the process of respiration, oxygen (O2) is taken in (breathed in) and carbon dioxide (CO2) is released. In our digestive system, we also need diffusion to absorb water in the large intestine.
And in plants, diffusion is also required for photosynthesis (a type of gas exchange in plants). Throughout the process of photosynthesis, carbon dioxide is taken in, and oxygen is released. Another example where plants use diffusion is in transpiration, which is the diffusion of water from a plant’s surface.
Tortoiseshell cats have an extra sex chromosome which causes their mottled fur colors; the different colors are a result of different X chromosomes being activated in random cells. This is called:
a. x-inactivation
b. x-expression
c. x-activation (not this, I know because I submitted and it's not this)
d. y-inactivation
Answers
Answer:
A. X-inactivation