| A | B |
|---|
| A vertebrate is any chordate that has a | backbone |
| Any animal with a spinal cord must be a(an) | vertebrate |
| In most fishes, the structures that are most important for obtaining oxygen from water are the | gills |
| Vertebrate X has gills. To determine whether vertebrate X is a fish, it would be useful to know if it also has | paired fins |
| Blood flows through the body of a fish in a | single-loop closed circulatory system |
| Most fishes get rid of nitrogenous wastes by | eleiminating ammonia from the gills and from the kidneys |
| The organ that adjusts the buoyancy of many bony fishes is the | swim bladder |
| If a species of fish reproduces through external fertilization, that species must be | oviparous |
| Which of the following is NOT a characteristic of most amphibians? | They have scales and claws. |
| Which feature distinguishes most fishes from most amphibians? | scales |
