Quiz 3

Question 1

Marine fishes

Answer 1

Jawless fish ~ (ex: lamprey)
Cartilaginous ~ have cartilage skeleton, not mineralized
Ray-finned/bony fish ~ mineralized skeleton
Flat sharks live on bottom, shown by flat body w/ eyes on top & mouth underneath (have flat teeth to grind shellfish)

Question 2

Marine Reptiles

Answer 2

~ lay eggs (amniotic eggs)
– Crocodiles ~ has highly energetic bouts of eating, can hunt on land as well.
– Sea Turtles ~ light/spongy bones, + fat deposits for buoyancy, thick hide/bony plates allow for compression, have shell & paddle like limbs.
– Iguanas ~ large claws to grip onto rocks, eat only seaweed, females are smaller and eat on land, males are bigger and can dive under.
– Snakes ~ come on land to breath, scales are small/non existent.

Question 3

Seabirds

Answer 3

» Penguins ~ long narrow wings, larger beak, webbed toes, divers
» Tubenoses ~ long distance flying, curved, tube like nostril, has salt glands (albatros)
» Pelicans and their relatives ~
» Gulls and their relatives ~ generalist feeders, don’t dive, gather in large groups

Question 4

Shorebirds

Answer 4

Long legs with skinny beaks.

Question 5

five characteristics shared by all chordates

Answer 5

Notochord, gill slits, dorsal nerve cord, ventral heart, and tail.

Question 6

Order Pinnipedia

Answer 6

(Seals, Sea Lions, Walruses)

Have layer of blubber and modified limbs into flippers

Question 7

Order Cetacea (Whales)

Answer 7

• Mysticetes – Baleen Whales ~ 2 blowholes, no teeth, filter feeders
• Odontocetes – Toothed Whales ~ 1 blowhole, teeth, eats fish/other mammals, uses melon for echolocation.

Question 8

Order Sirenia

Answer 8

(Manatees, Dugongs)

herbivores, no hind limbs, large flipper

Question 9

Order Carnivora

Answer 9

(Sea Otter, Polar Bear) ~ thick layer of fur used for warmth, specialized teeth used for tearing