No the myelin covers bits of the cell
The first species to colonize a barren area is a Pioneer Species
Answer:
meiosis
Explanation:
Down syndrome is an abnormality that occurs on chromosomes 21, it occurs because chromosomes 21 cannot be separated in meiosis, the pair of chromosomes 21 do not separate and go together to one of the daughter cells. In this way, the oocyte or the resulting sperm will have 24 chromosomes instead of 23. When in conception that oocyte or sperm joins the germ cell of its partner that contributes the 23 chromosomes, the total sum of chromosomes that will have the first cell of the new conceived being will be 47.
Answer:
Earth rotates on its axis; this causes us to experience day and night.
Explanation:
There is a time when Earth's north pole is tilting 23.5 degrees toward our Sun.
