Internal fertilization evolved many times in animals. According to David B. Dusenbery all the features with internal fertilization were most … Meer weergeven

Fertilization which takes place inside the female body is called internal fertilization in animals is done through the following different ways:
• Copulation, which involves the insertion of the penis or other intromittent organ into the Meer weergeven

• Gestation can and will add additional risks for the mother. The additional risks from gestation come from extra energy demands. Meer weergeven

Most amphibians have external fertilization but there is an exception to some like salamanders which mostly have internal fertilization. Salamanders do not use intercourse for sexual reproduction due to their lack of external penis. Rather, the male … Meer weergeven

At some point, the growing egg or offspring must be expelled. There are several possible modes of reproduction. These are traditionally classified as follows:
• Meer weergeven

Internal fertilization allows for:
• Female mate choice, which gives the female the ability to choose her partner before and … Meer weergeven

Some species of fish like guppies have the ability to internally fertilize, this process happens by the male inserting a tubular fin into the female's reproductive opening and then will … Meer weergeven