Answer:
The DNA must be copied so there is a full set of DNA to pass on to each daughter cell.
Explanation:
It protects the Earth from becoming over heated, but with pollution, global warming has become more apparent because of the destruction of the ozone layer
Answer:
D. caused by vibrations. B. A form of energy. F. A type of electromagnetic wave
Explanation:
Option C, animals moved from the sea to the land is the right answer.
The Paleozoic Era in the history of the earth was a time of major change on Earth. This was the period that ran about 542 to 251 million years ago. The period commenced with the split of a single super-continent and the development of another. Plants grew extensively. Moreover, the primary vertebral animals conquered the land.
The chromosomes become more compact and tightly coiled. They are ready to separate. :)
Hope this helps!
