BIOLOGY 181 LIFE IN THE OCEANS
UMUC FALL 2017
QUIZ 2
1. The closest living relative of the cetaceans is the:
a. Beaver
b. Elephant
c. Hippopotamus
e. Sea otter
e. Walrus
2. The closest living relative of the sirenians is the:
a. Beaver
b. Elephant
c. Hippopotamus
e. Sea otter
e. Walrus
3. All of these are adaptations of intertidal organisms for coping with low temperatures
EXCEPT:
a. Antifreeze compounds
b. Compact body form
c. Dark coloration
d. Ridged shells
4. The symbiotic algae found living in coral reefs are called:
a. Coccolithophorids
b. Diatoms
c. Dinoflagellates
d. Phytoplankton
e. Zooxanthellae
5. Animals that can live in a broad range of salinities are called:
a. Eukaryotic
b. Euryhaline
c. Polymorphic
d. Stenohaline
6. These sense organs enable sharks to detect electrical fields:
a. Ampullae of Lorenzini
b. Apical organs
c. Lateral lines
d. Ocelli
e. Semicircular canals
7. The skeleton of hagfish, lampreys, and sharks is composed of:
a. Calcium phosphate
b. Cartilage
c. Hydrated polymerized silicic acid (opal)
d. Spongin
8. The type of life cycle in which an individual initially is a male and then turns into a female is
called:
a. Heterospory
b. Protoandry
c. Protogyny
d. Simultaneous hermaphroditism
9. Vertebrates with a water-proof egg that can be laid on land are called:
a. Amniotes
b. Amphibians
c. Choanates
d. Sarcopterygians
e. Teleostomes
10. The zone of rapid increase in salinity is called the:
a. Halocline
b. Isocline
c. Pycnocline
d. Thermocline
11. Organisms that adjust the salinity of their body fluids to that of the external medium are
called:
a. Ectotherms
b. Endotherms
c. Homeotherms
d. Osmoconformers
e. Osmoregulators
12. Openings in the roots of mangroves to allow gas exchange are called:
a. Blastopores
b. Pneumatophores
c. Spiracles
d. Stomata
13. The muscles of diving mammals have abundant quantities of this molecule which stores] oxygen for deep dives:
a. Chlorocruorin
b. Hemeryhtrin
c. Myoglobin
d. Myosin
e. Tropomysoin
14. Estuaries carved by glaciers are called:
a. Bar-built estuaries
b. Coastal plain estuaries
c. Fjords
d. Tectonic estuaries
