List five invertebrate groups in the animal family tree

1. emigration the movement of people from one place to another

2. immigration a situation in which resources are being used up at a faster rate than they can be replenished

3. migration the leaving of one's homeland to settle in a new place

4. overpopulation the movement of people to a new country

5. sustainable development a situation in which the birth rate is not sufficient to replace the existing population

Explanation:

Those are the five invertebrate groups in the animal family tree

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

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it is called the mitotic spindle