**Put answers on a separate sheet, label and put your name on it


1.) Unlike invertebrate chordates, the notochord of vertebrates becomes the ____?

2.) Fish, amphibians and reptiles are ectothermic. What does this mean?

3.) Lampreys, rays, sharks, and their relatives have skeletons made of __?

4.) Lampreys and hagfish are mighty big eaters despite the fact that they do not have ___?

5.) Bony fish and cartilaginous fish have a lateral line system that does what?

6.) What allows bony fish like a bass to regulate their depth in water?

7.) How many chambers are in a fish heart?

8.) How many chambers are in an amphibian heart?

9.) How do amphibians “breathe?”

10.) You pick up an amphibian with relatively short legs and thick bumpy skin. It has large poison glands. What is the amphibian?

11.) Frogs do not have an outer ear but they do have a ______ ________ that picks up vibrations?

12.) Most reptiles have a ___ chambered heart except for crocodilians which have a ____ chambered heart?

13.) Reptiles and birds lay _______ eggs?

14.) All reptiles have _________ fertilization and they lay eggs?

15.) How are amniotic eggs of a reptile or bird different from the eggs of fish and amphibians?

16.) Explain how the development of the amniotic egg was important for the transition of animals from life in water to life on land.

17.) Feathers are modified___?

18.) Birds and mammals are_______ which means we are always hungry?

19.) Why is it important that birds and mammals have a 4 chambered heart?

20.) Where does the name mammal come from?

21.) Mammals are the only animals that have _______ or _____ to keep them warm?

22.) Mammals have a muscle called the ___ to provide increased oxygen for more activity?

23.) What is a monotreme?

24.) What is a marsupial?

25.) What kind of mammal is a human?

26.) Give an example of a monotreme.



LATERAL LINE SYSTEM                       SWIM BLADDER                       ECTOTHERMIC

TYMPANIC MEMBRANE                        AMNIOTIC EGG                         ENDOTHERMIC

PLACENTA                                           PLACENTAL MAMMAL              UTERUS

GLAND                                                 DIAPHRAGM                             MAMMARY GLAND

GESTATION                                          MARSUPIAL                             MONOTREME