BIO145 Marine Biology Lesson 7 Quiz

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Penguins

	live in polar regions of the Northern and Southern hemispheres.
	can be found as far north as the Equator.
	are ectotherms.
	time their reproduction so that eggs hatch during the winter.
	are able to fly when disturbed.

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Seals, sea lions, and the walrus are classified as belonging to the order

	Carnivora.
	Sirenia.
	Pinnipedia.
	Cetacea.
	Protochordata.

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Sea lions can be readily distinguished from seals because in contrast to seals, sea lions have

	a short neck.
	posterior flippers used in swimming.
	anterior flippers that cannot be rotated backward.
	posterior flippers that cannot be rotated backward.
	external ears.

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The walrus feeds mostly on

	clams.
	squid.
	salmon and other fish.
	kelp and other large seaweeds.
	dead animals.

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One can tell that cetaceans are mammals because they

	have hair.
	are cold-blooded.
	are ovoviviparous.
	must reproduce in the water.
	migrate.

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Which of these is an example of a toothed whale?

	Sperm
	Right
	Gray
	Fin
	Blue

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Porpoises can be distinguished from dolphins by comparing their

	flippers.
	fluke.
	reproductive strategies.
	teeth.
	blowholes.

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Blubber is found in all of these marine mammals except which of the following?

	Killer whale
	Seals
	Sea otters
	Sea lions
	Manatees (sea cow)

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All of these are functions of blubber except

	insulation.
	circulation.
	buoyancy.
	food reserve.
	protection.

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Baleen plates are

	rigid and have small hairs on one side only.
	soft and have hairs all around their surface.
	rigid and have hairs all around their surface.
	rigid without any hairs.
	soft without any hairs.

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Ambergris is _______________________.

	decayed blubber made into joint ointment
	undigested gut material from sperm whales
	a fine perfume made from whale oil
	special baleen found in the blue whale
	a small island in the Caribbean where whales congregate

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Dolphins and other whales adapt for deep diving by

	closing their ear openings.
	emitting sound to clear their ears.
	taking in as much air as possible.
	increasing blood circulation to the skin.
	collapsing their lungs.

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Which of the following is not an adaptation for deep diving in cetaceans?

	Having more red blood cells to store more oxygen
	Having more hemoglobin to store more oxygen
	Slowing down of the heart rate
	Lower tolerance to lactic acid
	Having a lot of myoglobin in muscles to store more oxygen

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In apneustic breathing, which is practiced by most marine mammals, ______________________.

	a small amount of air is kept in the lungs before diving
	a large amount of air is kept in the mouth before diving
	normal breathing is maintained before diving
	several deep breaths are taken before exhaling and diving
	no actual breathing takes place before diving

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Echolocation is a sense that relies on

	vibrations.
	sound.
	smell.
	vision.
	electromagnetic waves.

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Echolocation is present in

	all baleen whales
	all toothed whales
	some baleen whales
	some toothed whales
	some baleen whales AND most toothed whales

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The spermaceti organ of sperm whales is thought to regulate buoyancy and which of the following?

	Store food
	Produce sound
	Assist in oxygen storage
	Collect undigested food
	Focus and direct sound waves

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Breaching refers to whales

	jumping above the surface.
	getting stranded on shore.
	singing.
	emitting sound for navigation.
	diving deep to feed.

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The humpback and other baleen whales migrate every year to

	feed in Antarctica during winter.
	reproduce in Antarctica during summer.
	reproduce in the tropics during winter.
	feed in the tropics during winter.
	feed in the tropics during summer.

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Delayed implantation of the embryo allows pinnipeds to

	nurse a pup while pregnant.
	time birth with the arrival to the breeding area.
	delay courtship for a year.
	establish harems.
	ovulate after copulation.

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Which of the following alternatives does not apply to the typical cetacean calf?

	Born tail first
	Establishes a long and strong bond with its mother
	Feeds on very rich milk that is squirted directly into its mouth
	Is born with a developed blubber
	Must swim to the surface immediately after birth

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Which of the following is accurate regarding Emperor penguins?

	Pairs mate for life
	Lay two eggs during winter
	Live in the Arctic
	Female tends egg during development
	Eggs develop in about 64 days

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Convergent evolution means that

	organisms possess similar structures because they have a similar lifestyle.
	organisms possess similar structures because they descended from a common ancestor.
	closely related organisms have evolved and do not resemble one another anymore.
	closely related organisms have different structures for same purpose.
	none of the above.

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An example of convergent evolution is which of the following?

	Dolphins and whales
	Manatees and dugongs
	Dolphins and fish
	Seals and fur seals
	Dolphins and sea otters

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Which of the following marine birds has a long, forked tail and soars along the coast forcing other birds to regurgitate fish in midair?

	Arctic tern
	Sandpipers
	Pelicans
	Frigatebirds
	Penguins

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