Answer:
D) The catfish population helps control populations of water boatman and waterfleas.
Because acid will lower the ph
Answer:
Stomach - break down food
Small intestines - absorb all nutrients and seperate them from waste
Large Intestines - continue collecting any remaining nutrients and expell any waste
Answer:
Amphibians lay eggs.
Explanation:
Amphibians include frogs, toads, and salamanders. They are vertebrates, so they have a bony skeleton. Most amphibians live part of their lives underwater and part on land. Amphibians reproduce by laying eggs that do not have a soft skin, not a hard shell. Most females lay eggs in the water and the babies, called larvae or tadpoles, live in the water, using gills to breathe and finding food as fish do. As the tadpoles grow, they develop legs and lungs that allow them to live on land (aka metamorphosis). Even after they change, amphibians still have soft moist skin, and nearly all of them have to live in damp places, so they don't dry out.