What invertebrate animals are the ancestors of tetrapods A)jellyfish

B)cartilaginous fish

C)jawed fish

D)jawless fish

What is hydroelectric power produced by?

Body systems are not completely independent they integrate and work together describe one example of the integration between body systems

The bacteria inside a tube worm would be analogous to what organism in the ocean ecosystem near the waters surface? a. photosynthetic algae b. shrimp c. clown fish d. parasitic lamprey