In the earthworm body plan, the digestive system can be described as a “tube-within-a-tube.” Where would you expect to find most of the tissues that developed from endoderm?

Which of following reproductive strategies in mammals involves the mother laying eggs that hatch outside of her body?

If a tunicate’s pharyngeal gill slits were blocked by a foreign object, which of the following processes would the organism have trouble performing?

What would be the most effective method of reducing the incidence of blood flukes in a human population?

In examining an unknown animal species during its embryonic development, how can you be sure what you are looking at exhibits protostome or deuterostome development?

Which of the following analyses would best help to determine if a fossil represents a reptile or a mammal?

What would be the most effective method of reducing the incidence of blood flukes in a human population?

Which of the following characteristics is shared by a hagfish and a lamprey?

Which of the following characteristics do all insects exhibit?

Which of the following characteristics is unique to animals?