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vekshin1
3 years ago
8

According to Darwin, natural selection is a process by which?

Biology
1 answer:
JulsSmile [24]3 years ago
4 0

Answer:

According to Darwin natural selection is a process by which living organisms adapt and change to survive in nature and it's limited resources.

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If a DNA strand contains the sequence 5ʹ-ATTCCGGATCGA-3ʹ, which of the following is the sequence of the complementary strand o
Svetllana [295]

Answer:

5ʹ-ATTCCGGATCGA-3ʹ

Explanation:

In a double-stranded DNA, two strands are held together with the help of hydrogen bonds between nitrogenous bases and the two strands are anti-parallel, means one strands runs in 5' to 3' direction, while another strand runs in 3' to 5' direction.

According to complementary base pairing rule, adenine makes bonds with thymine and thymine makes bond with adenine; similarly, guanine makes bonds with cytosine and cytosine makes bonds with guanine.  

Thus, the complementary base pairing rule, complementary sequence for given DNA sequence would be:

5ʹ-TCGATCCGGAAT-3ʹ

3ʹ-AGCTAGGCCTTA-5ʹ, which can be also written as

5ʹ-ATTCCGGATCGA-3ʹ.

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The desired graph of the Antarctic food web is attached:

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