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TiliK225 [7]
3 years ago
6

2) Embryonic stem cells have shown promise when used to treat certain diseases. Despite this, there are many people opposed to s

tem cell research based on ethical grounds. What is one of their concerns?
Biology
1 answer:
Whitepunk [10]3 years ago
6 0

B) Embryonic stem cells research requires the use of human embryos.

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What are the possible offspring outcomes if Parent 1, Tt, crosses with Parent 2, tt?
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The possible outcomes are Tt and tt.

3 0
3 years ago
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What are some possible consequences of a mutation? Give a specific example for each consequence you list.
Tju [1.3M]
Since all cells in our body contain DNA, there are lots of places for mutations to occur; however, some mutations cannot be passed on to offspring and do not matter for evolution. Somatic mutations<span> occur in non-reproductive cells and won't be passed onto offspring. For example, the golden color on half of this Red Delicious apple was caused by a somatic mutation. Its seeds will not carry the mutation.
</span>

A single germ line mutation can have a range of effects:

<span><span>No change occurs in phenotype.
Some mutations don't have any noticeable effect on the phenotype of an organism. This can happen in many situations: perhaps the mutation occurs in a stretch of DNA with no function, or perhaps the mutation occurs in a protein-coding region, but ends up not affecting the amino acid sequence of the protein.</span><span>Small change occurs in phenotype.
A single mutation caused this cat's ears to curl backwards slightly.</span><span>Big change occurs in phenotype.
Some really important phenotypic changes, like DDT resistance in insects are sometimes caused by single mutations. A single mutation can also have strong negative effects for the organism. Mutations that cause the death of an organism are called lethals — and it doesn't get more negative than that.</span></span>
4 0
4 years ago
Aphids are a type of insect. They reproduce asexually in the spring and summer. They reproduce sexually in the fall. How might t
arlik [135]

Answer:

The ability of aphids to reproduce both sexually as well as asexually increases its chances for survival in an ecosystem. By the method of asexual reproduction, the aphids are able to multiply in numerous amounts due to which their population increases. Through sexual reproduction, genetic diversity will arise in the aphids population which will make it more stable to survive in an ecosystem. Hence, the aphids benefit from both the methods of reproduction.

5 0
3 years ago
What is refraction? What does it mean when we say that light is refracted as it enters the eye?
vivado [14]
The fact or phenomenon of light, radio waves, being deflected in passing obliquely through the interface between one medium and another or through a medium of varying density
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Learning objective: 12.08.05 describe the initiation and propagation of depolarization and repolarization.
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Depolarization is initiated when there is an influx of sodium inside the cell as opposed to repolarization, where potassium exits the cell (occurring after Na+ gates close). Remember that for every 3 Na+ in, there is 2 K+ out. This imbalance helps to stabilize the membrane.
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3 years ago
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