<h2>540 million years ago
</h2>
Paleozoic.
Era immediately follows Precambrian It lasted about 4.5 billion years.
When did abundant fossil evidence first appear in the geologic record.
540 million years ago.
Answer:
<h2>Cross out unnecessary phrases: Cut out introns.</h2>
Explanation:
The mRNA is a transcript of DNA . Primary mRNA transcript is edited before translation.
Mature mRNA is transcribed into protein, which is the final product of central dogma.
mRNA contains introns and exons , introns are removed by splicing.
the analogy of mRNA editing is Cross out unnecessary phrases: Cut out introns.
They grow much faster and they grow to be larger than normal crops.
Nonmetals take electrons from the metals they are attracted to in order to become stable.
Option C is the basic definition of a species. Can you think of some examples of plants or animals that satisfy A, B, or C that are not the same species?
