Question

The codons that code for alanine in a potato beetle are the same as those that code for alanine in mackerel and humans. This evidence best supports which of the following ideas?
A.
humans and fish evolved from insects
B.
different species synthesize the same proteins
C.
insects, fish, and humans express the same genes
D.
different species share components of the genetic code

Answer 1

The codons that code for alanine in a potato beetle are the same as those that code for alanine in mackerel and humans. This evidence best supports  the idea that -(D) different species share components of the genetic code

Explanation:

Evaluating the other options given

A.humans and fish evolved from insects -This option is incorrect as human and fish did not have a common ancestors.

B. different species synthesize the same proteins :No this statement also is not the correct option

C. insects, fish, and humans express the same genes-The  expressed genes cannot be same for different species

Hence the correct answer is

The codons that code for alanine in a potato beetle are the same as those that code for alanine in mackerel and humans. This evidence best supports  the idea that -(D) different species share components of the genetic code(As the genetic code is said to be universal