Question

Below are DNA sequences for two species. Identify how closely the species are related and what proves the relationship. Species A TAGCTTAGGGACGG Species B TACCTTAGGGACGG a)The species are not closely related because their nucleotide sequences are almost identical. b) The species are closely related because their nucleotide sequences are nearly identical. c) The species are not closely related because there are many differences between their nucleotide sequences. d) The species are closely related because they have the same number of nucleotides in their nucleotide sequences.

Answer 1

Answer:

Option (B).

Explanation:

The relationship between closely related species can be studied by their evolutionary tree. The two species are closely related if they have similar characteristics and nucleotide sequence.

Species A has the DNA sequence TAGCTTAGGGACGG  whereas species B has the DNA sequence TACCTTAGGGACGG. These two species have identical nucleotide sequence with minor differences. Hence, these two species are closely related with each other.

Thus, the correct answer is option (B).

Answer 2

 D, they were more closely relative because of their nuclear tide, and same species.