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

Question

anonymous · Answer

Fish are invertebrates and have scales and paired fins, while mammals are vertebrates and have fur or hair.

 Fish are ectothermic and lay eggs to reproduce, while mammals are endothermic and give live birth to offspring.

 Fish are endothermic and have gills, while mammals are ectothermic and have lungs.

 Fish have streamlined bodies and three-chambered hearts, while mammals are bipedal and have four-chambered hearts.

anonymous · Answer

I'm sure you can figure this out yourself...

anonymous · Answer

there is more than one though

anonymous · Answer

i think B though

anonymous · Answer

That would make sense, yes. The others are really obviously wrong.

anonymous · Answer

yeah i guess thx

anonymous · Answer

(There are a few viviparous fish and some egg-laying mammals... but they're the exception rather than the rule.)