Exam 3 Review

Front

Monotremes include _____________.

Back

platypuses

Front

Animals existing before the Cambrian period were believed to be: _____________.

Back

small and soft-bodied

Front

Eccrine glands produce _____________.

Back

sweat

Front

If a Hox 13 gene in a mouse was replaced with a Hox 1 gene, how might this alter animal development? _____________.

Back

The animal might develop two heads and no tail.

Front

Members of Chondrichthyes differ from members of Osteichthyes by having (a) _____________.

Back

cartilaginous skeleton

Front

Define Monotremes.

Back

A group of egg-laying mammals, including the platypus and echidnas.

Front

What is the significance of the Cambrian period in evolutionary history?

Back

It marks a period of rapid diversification of life forms and the appearance of most major animal phyla.

Front

What are Eccrine glands and their function?

Back

Sweat glands that help regulate body temperature through the secretion of sweat.

Front

What role do Hox genes play in animal development?

Back

They determine the body plan and the identity of body segments during embryonic development.

Front

What distinguishes Chondrichthyes from Osteichthyes?

Back

Chondrichthyes have a skeleton made of cartilage, while Osteichthyes have a bony skeleton.