7. The number of chromosomes
1 is specific for each type of organism
2 is the same for every species of organism
3 decreases from one generation to the next
4 increases from one generation to the next

The number of chromosomes

is specific for each type of organism

Explanation:

Chromosomes number among organisms varies e.g human chromosome number is 46 while that of cat is 38 which shows the variance in chromosome number among organisms

i have no idea what the answer is im sorry.

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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