Oceanography Chapter 14 Homework

How does sonar work?

a sound signal is bounced off the ocean floor.

Probably the greatest threat to gray whale calves today is _____.

Killer whales

The fins used by fishes primarily for maneuvering are ______.

Pectoral and pelvic

Sharks have lunate caudal fins.

False

Radiolarians and coccolithophorids are examples of zooplankton.

False

What does sonar data tell us about the seafloor?

Depth, shape and composition

Because of the scarcity of food in the deep-sea environment, many organisms rely on _______ as their principal source of food.

Detritus

How are echolocation and sonar different?

Echolocation is used by dolphins and whales, whereas sonar is a data collection tool developed by people.

Where do dolphins generate sounds for use in echolocation?

In the blowhole

A symbiotic relationship in which both organisms benefit is called _______.

Mutualism

The oxygen-storing compound in the red muscle tissue of fishes is called ______.

Myoglobin

What does a dolphin's melon do?

The melon focuses sound waves during emission

The California gray whale is unusual because it stirs up bottom sediment in order to feed.

True

The stinging cells used by cnidarians to capture prey are called _______.

nematocysts

Match the organism with its correct taxonomic classification: Bottlenose dolphin

order Cetcea, suborder Odontocetti

Individual fishes within schools maintaining their spacing through visual contact and ______.

the lateral line system

The function of a swim bladder is

to allow a fish to change position in the water column