Freshwater Organisms

"Smooth, moist skin", "lay eggs in water", "spend part of their life in water" are all descriptions of what type of organisms?

• Fish

• Amphibians

• Reptiles

• Macroinvertebrates

organisms without backbones are called-

• invertivores

• macroinvertebrates

• vertebrates

• chordates

Fish, reptiles and amphibians are all ectothermic. What does this mean?

• they are warm blooded

• they are cold-blooded

• they generate their own body heat

Macroinvertebrates that are adapted for digging are called-

• divers

• burrowers

• clingers

• climbers

Macroinvertebrates that float in open water are called-

• nekton

• benthos

• sprawlers

• plankton

Fish that eat other fish are called-

• omnivores

• invertivores

• piscivores

• herbivores

Fish that eat invertebrates are called-

• piscivores

• invertivores

• omnivores

• herbivores

Fish that eat plants are called

• piscivores

• invertivores

• omnivores

• herbivores

Which of the following are not one of the 3 classes of fish?

• Agnatha

• Perch

• Chondricthyes

• Osteichthyes

Oldest, most primitive class of fish that lack scales, are jawless and have an oral sucker are known as the class-

• Agnatha

• Chondricthyes

• Osteichthyes

• Chordata