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shepuryov [24]
3 years ago
14

What does Darwin’s theory of evolution explain about the natural world

Biology
1 answer:
coldgirl [10]3 years ago
8 0

Answer:

1). All living organisms are constantly involved in 'a struggle for existence'.

2). In a population, those that tend to survive and reproduce are the individuals whose variations gives them competitive advantage over the rest.

Explanation:

Darwin, thus, identified environmental pressures as the main cause of natural selection. They cause favourable variations to accumulate and unfavourable ones to be weeded out. Over thousands of generations, favourable variations, naturally selected by he environment, accumulate sufficiently to give rise to new species from ancestral species. Therefore, according to Darwin, natural selection, acting through environmental pressure, is the driving force behind evolutionary change in the natural world.

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An animal cell with a 30% salt solution is placed in a beaker with a 20% salt
AleksAgata [21]

Answer:

the animal cell will burst

Explanation:

If the salt solution in the animal cell is 30%, it means the water is at a 70% concentration. Outside is 20%, so the water is 80%.

Water will enter the cell. Water is at a higher concentration outside the cell (80%) or a lower concentration inside the cell (70%) by the process of osmosis.

Eventually, the animal cell will burst, because it does not have any cell wall to control the swelling of the cell that occurs as water flows in.

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3 years ago
Is Glycogen a long term energy carbohydrate?
valentinak56 [21]
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5 0
3 years ago
Which statement best describes a population that competes for reproductive purposes?
In-s [12.5K]
Where are the statements?
5 0
3 years ago
Recently, Zika virus has been in the news. Treatment of it is of particular concern. Why?
Vesnalui [34]
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6 0
3 years ago
You have been given a single virgin Drosophila female. You notice that the bristles on her thorax are much shorter than normal.
eimsori [14]

Answer:

B

Explanation:

We never see short bristle males, suggesting some type of lethality. I.e. any males who inherit the mutation die before birth so we don't see the phenotype. This also hints that it could be X-linked.

Females can be short bristled, but males can't, as it is likely lethal. This suggests that having one copy of the short bristle trait without the long bristle trait is lethal (as males as XY and so only have one copy of the trait). The female then must be heterozygous for the short bristle trait (which also explains how in generation F2, long bristle males can be produced, as if she was homozygous males would all be short bristled, and therefore dead, so there would be no males.

Since the first short bristle female is heterozygous, the trait for short bristles must be dominant.

However, since evidence suggests the trait is X-linked, it cannot be autosomal, as suggested in B.

8 0
3 years ago
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