No, polar bears does not migrate.
Answer:
The hemoglobin molecule has four binding sites for oxygen molecules: the iron atoms in the four heme groups. Thus, each Hb tetramer can bind four oxygen molecules.
Hydrolysis is the answer good luck
Answer:
homeostasis is the state of steady internal physical and chemical conditions maintained by living system.
Diffusion is an important process for living things; it is how substances move in and out of cells.
Diffusion helps maintain homeostasis by creating specific concentrations of molecules inside the body compared to outside and Cells in homeostasis are successfully maintaining the internal conditions necessary for basic functioning
The cell needs to export waste and other molecules, and import fuels and fluids. Plasma membranes allow water, oxygen and carbon dioxide to pass through by osmosis, or passive diffusion.
The earliest forms would be plants and other life like that, and current day would be mostly humans and animals and a lot of plants are disappearing
