Fishes and Amphibians

Which one does not belong to the phylum Chordata?

• fishes

• mammals

• birds

• arthropods

What do animals that are known as chordates have?

• Dorsal nerve chord

• Bones

• Dorsal column

An _____________ organism cannot regulate its body temperature by generating internal heat.

• ectothermic

• endothermic

• oviviparous

Jawless fish are in the class:

• Agnatha

• Apoda

• Chordata

__________ allow fish to breathe.

• Gills

• Fins

• Noses

The organ that allows fish to stay afloat for an indefinite time at different depths is known as:

• branchiae

• swim bladder

• gills

A ________ is a marine parasite at the mercy of ocean currents.

• lamprey

• jellyfish

• shark

The most highly developed sense in sharks is:

• smell

• taste

• sight

___________ are amphibians that harbor heat.

• Anurans

• Apoda

• Agnatha

In which environment are amphibians most common?

• Hot, humid environments.

• Hot, dry, environments.

• Cold, humid environments.