Bony Fish
This structure helps bony fish control buoyancy.
What is the swim bladder?
This type of skin helps reptiles prevent water loss.
What are keratinized scales?
The larval stage of a frog.
what is a tadpole
This structure is shared by all vertebrates.
what is a backbone
In an aquatic food web, energy flows from producers to consumers; this organism occupies the primary consumer level.
what is zooplankton
This system allows fish to detect vibrations in water.
What is lateral line.
Most reptiles have this many heart chambers.
What is three
Amphibians must keep their skin moist primarily for this reason.
What is respiration?
Relying on outside sources for body temperature. Reptiles and amphibians are both classified as this.
What is ectothermic. (cold blooded)
This structure allows fish to exchange gases with water.
what are gills
Early fish became active predators after developing this adaptation.
What are jaws
This reptile group has a four-chambered heart.
What are crocodilians
Amphibian eggs require water because they lack this feature.
What are protective shells?
What group of fish are the ancestors of land vertebrates?
What are lobe-finned fish.
Amphibians are especially sensitive to pollution because of this skin characteristic.
what is permeable skin
This substance makes up the skeleton of sharks.
What is cartilage?
This structure allows reptiles to reproduce on land.
What is amniotic egg
This process involves major body changes during development.
what is metamorphosis
This structure allows turtles to survive predators.
what is a shell
This group of fish lacks jaws and paired fins.
what is Agnatha
Fish hearts contain this many chambers.
What is two
Snakes use these organs to detect heat.
what are pit organs
This respiratory method allows amphibians to absorb oxygen directly through their skin.
What is cutaneous respiration?
In a food web, energy flows in this direction.
This structure covers and protects the gills of bony fish.
what is the operculum