7. which of the following is not a characteristic of chordates
a. post-anal tail
b. dorsal hollow nerve cord
c. spinal column
d. notochord

8. in order for the exchange of oxygen and carbon dioxide to occur, an animal’s respiratory surfaces must remain
a. cold c. hot
b. dry d. moist

9. a bird’s instinct to fly south for the winter is an example of which type of behavior
a. learned behavior
b. habituation
c. observant conditioning
d. innate behavior

10. echinoderms are most closely related to chordates because both are
a. protostomes
b. deuterostomes
c. endotherms
d. ectotherms

11. what advantage do forward facing eyes provide primates
a. the ability to form extended social groups
b. the ability to judge the distance of branches
c. the ability to manipulate tools
d. the ability to find mates easier

12. what type of symmetry does the animal in the figure display
a. asymmetrical c. radial
b. bilateral d. multi-symmetry

13. the ability for animals to reproduce on land was primarily due to
a. lungs c. 4 limbs
b. endothermy d. amniotic eggs

14. cephalization allows animals to
a. gain information about their environment
b. escape from predators
c. attract mates
d. increases the production of offspring

15. termites can often be found with protists in their gut. the protists aid in the digestion of cellulose, which is found in the wood termites eat. what type of relationship is this
a. parasite c. mutualism
b. commensalism d. cohabitation

16. which is true about gas exchange in respiratory systems
a. gases diffuse from areas of low concentration to areas of high concentration
b. gases diffuse from areas of high concentration to areas of low concentration
c. gases diffuse equally in most situations
d. concentration has no effect on gas diffusion

17. when you use your knowledge and experience to figure out an error message on your computer, you are using
a. classical conditioning c. innate behavior
b. insight learning d. trial-and error learning

18. which of the following types of cells produce a muscle contraction
a. sensory neuron
b. interneuron
c. motor neuron
d. all neurons can stimulate muscle contraction

19. what is the function of the excretory system
a. to supply cells with oxygen and nutrients
b. to rid the body of metabolic wastes
c. the exchange oxygen and carbon dioxide with the environment
d. to break down food

20. examining the teeth of an animal can give you information about whether it
a. practices intracellular or extracellular digestion
b. is a filter feeder or a detritivore
c. is a nutritional symbiont
d. is a herbivore or carnivore