Question

1. a series of cell division in the developing embryo.
2.a surrouding in which an organism lives.
3.a hormone that causes myxoedema.


name them （＾_＾）​

Answer 1

Answer:

1. During cleavage, the cells divide without an increase in mass; that is, one large single-celled zygote divides into multiple smaller cells. Each cell within the blastula is called a blastomere.
2. During cleavage, the cells divide without an increase in mass; that is, one large single-celled zygote divides into multiple smaller cells. Each cell within the blastula is called a blastomere. Cleavage can take place in two ways: holoblastic (total) cleavage or meroblastic (partial) cleavage.
3. Myxedema (crisis) coma is a loss of brain function as a result of severe, longstanding low level of thyroid hormone in the blood (hypothyroidism). Myxedema com is considered a rare life-threatening complication of hypothyroidism, and represents one of the more serious side of of thyroid disease.