Marine Biology Exam 4 Questions and Answers |Complete Solutions Graded A+|100% Correct
Pinnipeds a group of marine mammals with flippers instead of feet; seals, sea lions and
walruses. primarily in cold waters, carnivorous, conserve heat with blubber and fur
true seals characterized by having no visible ear flaps and small front and back flippers that
do not rotate to allow them to support their weight
sea lions have external ears, move rear flippers so they can walk on all four limbs, males
larger than females
walrus either of two large northern marine mammals having ivory tusks and tough hide over
thick blubber, feed on benthic organisms
sea otters -smallest marine mammal
-found along Pacific coast from California to Siberia
-belongs to weasel family
-lacks a blubber layer so air trapped beneath dense fur provides insulation and buoyancy
-eats benthic invertebrates and uses tools
-need to consume 25-39% of body mass per day
-recently declined due to killer whales in Alaska
sirenia -manatees, dugongs
-aquatic
-finlike forelimbs and no hind limbs
-herbivorous
-depend on seagrass beds for food
blubber an insulating layer of fat under the skin of whales and other large marine mammals
, baleen thin plates that hang from upper part of a whales mouth, used for straining out
water to get krill and plankton
krill small, shrimplike creatures, food for whales and fish
whale migration pattern feed in polar waters, breed in more temperate waters
sperm whale largest toothed whale, eats squid, has large blubber deposit in its head
echolocation the process of using reflected sound waves to find objects; cetaceans use
"melon" to channel soundwaves and create clicks with airsacs
killer whales toothed whales in polar waters, coordinated hunting behavior, complex social
groups that do not interact
Common Dolphin toothed whale found in any temperate waters, complex social
interactions, form extremely large mating and traveling pods
heterotrophic dinoflagellates marine protist, encounter feeders, find prey randomly but can
detect prey signals
ciliates A group of protozoans that move by waving tiny, hair-like organelles called cilia.
forams A marine protozoan that secretes a shell and extends pseudopodia through pores in
its shell
Porifera (sponges) -no symmetry
Pinnipeds a group of marine mammals with flippers instead of feet; seals, sea lions and
walruses. primarily in cold waters, carnivorous, conserve heat with blubber and fur
true seals characterized by having no visible ear flaps and small front and back flippers that
do not rotate to allow them to support their weight
sea lions have external ears, move rear flippers so they can walk on all four limbs, males
larger than females
walrus either of two large northern marine mammals having ivory tusks and tough hide over
thick blubber, feed on benthic organisms
sea otters -smallest marine mammal
-found along Pacific coast from California to Siberia
-belongs to weasel family
-lacks a blubber layer so air trapped beneath dense fur provides insulation and buoyancy
-eats benthic invertebrates and uses tools
-need to consume 25-39% of body mass per day
-recently declined due to killer whales in Alaska
sirenia -manatees, dugongs
-aquatic
-finlike forelimbs and no hind limbs
-herbivorous
-depend on seagrass beds for food
blubber an insulating layer of fat under the skin of whales and other large marine mammals
, baleen thin plates that hang from upper part of a whales mouth, used for straining out
water to get krill and plankton
krill small, shrimplike creatures, food for whales and fish
whale migration pattern feed in polar waters, breed in more temperate waters
sperm whale largest toothed whale, eats squid, has large blubber deposit in its head
echolocation the process of using reflected sound waves to find objects; cetaceans use
"melon" to channel soundwaves and create clicks with airsacs
killer whales toothed whales in polar waters, coordinated hunting behavior, complex social
groups that do not interact
Common Dolphin toothed whale found in any temperate waters, complex social
interactions, form extremely large mating and traveling pods
heterotrophic dinoflagellates marine protist, encounter feeders, find prey randomly but can
detect prey signals
ciliates A group of protozoans that move by waving tiny, hair-like organelles called cilia.
forams A marine protozoan that secretes a shell and extends pseudopodia through pores in
its shell
Porifera (sponges) -no symmetry
