Kangaroo:The reproduction process is very interesting for the Kangaroos. Male Kangaroos are called bucks and the females are referred to as does. They young ones are called joeys. Mating usually takes place during the rainy season of the year. When the vegetation is green and food is plentiful the mature males and females will begin to attract each other for mating purposes.
The female is able to delay the attachment of the embryo to the fetus. This means she is able to control when she will be pregnant. When she has a joey in her body she won’t allow that to happen. Should her young die or mature enough to leave her then she will immediately become pregnant again. As long as conditions are right they can breed all year long.
Seal:The females will develop an egg that is protected in the uterus by fluids. She too will produce more of her hormones and as a result she is going to take an interest in the males that are around her. The dominant of the males are the ones that will get the right to breed with the females. The males don’t even eat during this period of time because they don’t want to risk other males trying to breed with a female they are interested in.
Rabbit:Rabbit breeds of medium to large size are sexually mature at 4 to 4.5 months, giant breeds at 6 to 9 months, and small breeds (such as the Polish Dwarf and Dutch) at 3.5 to 4 months of age. The release of eggs in female rabbits is triggered by sexual intercourse, not by a cycle of hormones as in humans.
1-some animals get extinct.
2-there's mor carbon dioxide and they day
3-there's les vegetation for mammals.
4-animals are in cover and they gave to get out and they day or get keeled.
5-they can take a long time to adapt and they day.