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Nata [24]
3 years ago
7

How did some stickleback populations come to live exclusively in fresh water?

Biology
1 answer:
mihalych1998 [28]3 years ago
3 0

Answer: Some sticklebacks were stranded in lakes that were formed in the ice age

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Most RNA viruses carry which of the following enzymes?
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Answer:

The correct answer will be option-B.

Explanation:

Viral polymerases are the enzymes which play an important role in the viral genome transcription and replication.

Retrovirus is the single-stranded RNA viruses which replicate through a DNA intermediate and therefore requires the <em>RNA-dependent DNA polymerase or reverse transcriptase</em>. Reverse transcriptase encodes DNA from the strand of RNA which can be replicated and helps in the reproduction of the virus.

Thus, option- B is the correct answer.

6 0
3 years ago
A research biologist is studying cells from a new organism recently discovered in the Brazilian rain forest. She determines that
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Answer:

(2⁵)²: 1024 combinations

Explanation:

In this case, the chromosome haploid number (n) of the target species is equal to 10, and therefore its diploid number (2n) is equal to 5 (i.e., somatic cells in the target species contain 5 pairs of chromosomes). That means that one individual can produce 2⁵ or 32 different gametic combinations. Moreover, the number of possible combinations that emerge from paring different gametes (sexual reproduction) can be calculated as (32)² = 1024 combinations.

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3 years ago
What is a cephalopod?
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When insects are accidentally transported from one country to a new habitat in another country, the
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