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andrew-mc [135]
3 years ago
6

Who developed the theory of evolution known as “natural selection”

Biology
1 answer:
gulaghasi [49]3 years ago
8 0

Answer:charles darwin

Explanation:

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In 1985, research by ______________ and his colleagues at leicester university, england led to the discovery that portions of th
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3 years ago
What will be the effects if asteroid or comet hits the earth
AURORKA [14]

If the comet were to strike the planet, the impact energy would be about 300 times that of the asteroid collision that was thought to have caused the Cretaceous-Tertiary extinction that killed the dinosaurs about 65 million years ago.

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3 years ago
A geneticist isolates a gene for a specific trait under study She also isolates the corresponding mRNA Upon comparison, the mRNA
olga nikolaevna [1]

Answer:

C) no, the final mRNA contains only exons, the introns were removed

Explanation:

Exons are the coding areas while the introns are non-coding areas. Both of these are the sequences of nucleotide within a gene.

RNA splicing is a process which usually occurs as the RNA matures, causing the removal of introns ( non coding areas of the RNA ) i-e they will not be expressed in the final messenger RNA, while exons continue to form covalent bonds with one another to form a  mature mRNA.

So in the given scenario, Upon comparison, the mRNA is found to contain 1,000 fewer bases than the DNA sequence because the introns were removed by RNA splicing.

Hence option C) no, the final mRNA contains only exons, the introns were removed is correct.

5 0
3 years ago
An enhancer may increase the frequency of transcription initiation for its associated gene when… (indicate true or false for eac
Olenka [21]

Answer:

it is located 1000 nucleotides upstream of the gene’s core promoter - true

it is located 1000 nucleotides downstream of the gene’s core promoter- true

it is in the gene’s coding region - False

Explanation:

These enhancers are located 50 or more kilobases from the promoter they controlled upstream from a promoter, downstream from a promoter within an intron, or even downstream from the <u>final exon</u> of a gene which can be thousands of bp away from the gene's core promoter and can also occur thousands of nucleotides away from the gene's core promoter needing the activity of a DNA -bending protein that binds to the enhancer changing the shape of the DNA and allow interactions between the activators and transcription factors.

4 0
3 years ago
Please hurry thank you!Which of the following is an organic molecule?
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Answer:

A. fructose

Explanation:

Organic molecules are molecules with carbon in it. Fructose is the only molecule with carbon. It has the molecular formula C6H12O6.

5 0
2 years ago
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