Question

explain why?

In the evolution of the eukaryotic cell, these cells have key changes that include which of the following: a) These cells reproduce by copying their DNA perfectly each generation. b) They have their DNA in the nucleoid area. c) have adapted the mesosome membrane system of the prokaryote to form a nucleus and an endoplasmic reticulum. d) each new type of new eukaryote cell has its mRNA unchanged from its original mRNA,

Answer 1

Eukaryotes have their DNA in the nucleus, but not in the nucleoid.
Prokaryotic mesosome is the functional counterpart of bacteria with that of eukaryotic mitochondrial inner membrane, but it cannot form or develop into endoplasmic reticulum or nuclear membrane.
Each new type of new eukaryote has its mRNA, which is changed to some extent from its original mRNA.

Thus, options, "b, c and d" are the wrong answers.

The DNA of every eukaryotic cell gets perfectly copied first in every generation before it reproduces. This is the key change that has taken place in the evolution of the eukaryotic cells. Because perfect DNA copying is the basic event of cellular reproduction in eukaryotic cells, since DNA is the blue print of the basic structure of the eukaryotic cell. If DNA changes more, then the newly made cell from its previously existing cell cannot survive with the newly made DNA copy due to its incompatible structure and genetic information.

Hence, option, "a" is the correct answer.