Answer:
There children will be of A or B blood group with one or their antigen and an antigens if O type
Answer:
cellular Respiration is that cells use oxygen in mitochondria to make ATP and GTP for cells
Possibility of acid rain will increase
<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.
