Secretion of human chorionic gonadotropin [HCG] only occur during pregnancy in the placenta. The concentration of this hormone increase rapidly during the first three months of pregnancy; the amount in the blood stream doubles every two to three days as the development of the placenta and embryo progress. The hormone reaches its maximum concentration peak around the sixth week of pregnancy and after this, its concentration decline.
Answer:
I think that the answer is c. If not then it is probably d or a.
A. Skeletal and muscular
the other three don’t have to do with this type of internal movement though as the abdominal region and internal organs don’t have to do with this, A is the only possible answer
I think there’s is 36 protons
Population- number of people or animals in a particular place.
Examples:
•events
•over 8M people living in NYC
•businesses
