First thing is Male gametes are called sperm and Female gametes are called eggs. So some physical differences are that the eggs are spherical in shape, much larger then sperm, and are immobile (they stay in the female reproductive organ during fertilization). Sperm are smaller, are in a cone shape, and have tails so the could move to the egg during fertilization.
Pollution is the biggest impact as well as deforestation
I believe the answer is C
I read something in my textbook about all living organisms have history of the same genetic info =D
