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In amniotic eggs, this membrane layer stores waste products from the embryo and also serve as a gas exchange organ from the embryo.

Classification of Birds is based on which of the following:

This Class is viewed as a transitional group of animals because most begin life as aquatic larva and goes through metamorphosis to become terrestrial adults:

One of the most primitive living Vertebrates, this organism has no true jaw structure, lacks paired fins and is ectoparasitic to other fish:

This organism’s body is elongated and lance shaped. It is commonly found in sandy bottoms of coastal waters and retains all 4 chordate characteristics into adulthood.

Cartilaginous fish belong to this Class:

The ability to walk upright on two feet is known as:

Kangaroos belong to which of the following categories of Mammals?

Birds with seed-cracking beaks and perching feet best describe which group:

This group is though to be the most primitive primates, consisting of lemurs and tarsiers.