Ch. 14- 1: Quiz Review

Which of the following are characteristics present at some stage in the development of chordates?

• notochord

• postanal tail

• nerve cord

• pharyngeal pouches

What is the flexible but firm internal structure that supports the animal and extends along the upper part of its body?

• notocord

• postanal tail

• nerve cord

• vertebrae

What replaces the notochord in most vertebrates?

What is the name of the internal framework that all vertebrates have?

• vertebrae

• nerve cord

• endoskeleton

• notochord

Select all options true of pharyngeal pouches.

• found in the region between the mouth and digestive tube as pairs of openings to the outside

• in some vertebrates they are used to filter feed

• in fish these are what develop into internal gills

• this is the part that becomes the tube connecting the ears to the throat in humans

The muscular structure at the end of developing chordates, in which the notochord extends into, is called what?

• endoskeleton

• postanal tail

• vertebrae

• spinal chord

The tubelike structure that develops into the brain and spinal cord, forming the central nervous system is called what?

An _______ has an internal body temperature that changes with the temperature of its surroundings.

• endotherm

• ectotherm

An ____________ has a nearly constant internal body temperature.

• endotherm

• ectotherm

Which of the following would not be an example of an endotherm?

• humans

• birds

• snakes

• polar bears