How do our muscles and bones respond to changes in gravity?

Researchers have found that bone and muscle mass are regulated by the altered gravity. ... The team found that changing gravity with a physical load of own body weight altered the bone mass of forefoot (humerus) especially in fourth-foot walk animals (tetrapods) such as mice.

c-flooding of the area and the development of wetlands

fertilization is the union of an egg and a sperm cell i believe.