The male part of a flower is the stamen. All flowers have both male and female parts. Pollination and fertilization are the same thing. A seed is a ripened ovary. There are seven classes of vertebrates.
Sharks have a cartilage skeleton.
Ninety five percent of all fish are in the class agnatha. No amphibians have claws on their toes. The tail of a salamander is flattened from top to bottom. Reptiles have a two-chambered heart. The membrane lining the shell of an amniote egg is known as the glottis.