Which of the following best explains ways in which fish and mammals differ?

Question

anonymous · Answer

fish lay eggs while mammals give birth.

girlgoyleh. · Answer

Fish have scales, gills, are aquatic, and lay eggs. Mammals have hair, lungs, live on land, and they give live birth.

wolfe8 · Answer

Welcome to OpenStudy. 
I don't know how you guys are answering this since the choices are not given.

beccaboo333 · Answer

Not every single mammal gives birth, platypuses are mammals and lay eggs. Whales live in the ocean (aquatic) and give birth. So we must wait for the options in order to answer this.

wolfe8 · Answer

Whales are not fish they're mammals but yes platypus are egg-laying mammals.

beccaboo333 · Answer

I knew they aren't fish >.< I was just saying..