FISH

most fishes are characterized by each of the following EXCEPT

• a cartilaginous skeleton

• scales

• paired fins

• gills

In most fishes, the structures that are most importantfor obtaining oxygen from water are the

• scales

• gills

• lungs

• vertebrae

The first vertebrates to evolve were

• amphibians

• lancelets

• fishes

• tunicates

If a fish's olfactory bulbs were damaged, the fish probably would be unable to

• coordinate its body movements

• recognize substances by their smell

• discriminate between light and dark objects

• detect vibrations in the water

The organ that adjusts the buoyancy of many bony fishes is the

• swim bladder

• cerebellum

• ventricle

• kidney

Suppose a fish is swimming upstream in a total darkness. Which of the following would be most likely to help the fish sense aquatic predators that approach it from behind?

• its well-developed eyes

• its chemoreceptors

• its lateral line system

• its bulbus arteriosus

Modern jawless fishes include

• skates

• sharks

• lampreys

• lungfishes

All fishes in the class Chondrichthyes are alike in the

• foods that they eat

• size and form of their teeth

• shape of their bodies

• composition of their skeletons

The harder a body part is, the greater the chance that it will be well preserved as a fossil. On that basis, which of the following groups of fishes would leave the best-preserved fossils of their skeletons?

• hagfishes

• lungfishes

• sharks

• lampreys

An example of a mode of feeding in fish is

• herbivore

• carnivore

• filter feeder

• all of the above