Part A.Vocabulary Review
Directions:Complete the following sentences using the terms listed below.
amniotic egg nerve cord estivation notochord________
postanal tail ectotherm fins vertabrae______________
gill slits endoskeleton cartilage scales_____________
chordates endotherm hibernation__________________
1. The body temperature of a(n) ____________________ changes with its surroundings.
2. A(n) ____________________ is a structure that later develops a brain at one end.
3. Muscles attach to the ____________________, which protects internal organs.
4. The ____________________, a structure along a chordates body, becomes the backbone.
5. A (n) ____________________ has a body temperature that stays the same in all climates.
6. ____________________ are found between the mouth and digestive tube in all chordates.
7. A period of inactivity in the winter is known as _________________________________________________________________.
8. Fanlike structures used by fish for steering and balancing are called __________________________________________________________________-.
9. ____________________ are overlapping, thin, hard plates that cover a fishs body.
10. A(n)____________________ is a muscular structure at the end of the developing chordate.
11. ____________________ is a period of inactivity during hot summer months.
12. Your ears and the tip of your nose are made of ________________________________________________________________.
13. ____________________ and cartilage make up the backbone that surrounds and protects the
spinal nerve cord.
14. ____________________ have a notochord, a nerve chord, and gill slits at some time during
15. The fluid-filled sac enclosed by a leathery shell that houses developing reptilian embryos is
called a(n) ___________________________________________________________________.
Part B.Concept Review
1. List four characteristics common to all chordates.
VOCAB FOR TEST
a. amniotic egg
b. biological indicator
e. nerve cord
j. gill slits