What animal is the closest cousin to dolphins. Explain the proof behind this evolutionary connection.

Sea Squirts and You. Nick Hobgood. Continue Reading Below. We've talked about sea squirts (tunicates) before. They're the poor, unfortunate souls that swim around like little tadpoles, happy as any spermlike creature can be expected to be, when all of a sudden their evolutionary programming takes over and they attach themselves to the sea floor, devour their own brains, lose their ability to swim and filter feed for the rest of their boring, miserable existence.

Hyenas and Mongooses. Continue Reading Below. We know what you're probably thinking right about now. "Come on, Cracked," you say in your thick Scottish brogue (because we like to imagine that all our readers sound like Sean Connery).

Donkeys and Rhinos. Continue Reading Below. The peaceful equids (horses, donkeys and zebras) were enslaved by the human race to do our bidding -- sorry, domesticated -- several thousand years ago, and since that time they've been an invaluable resource for transportation, agriculture, warfare, companionship and sometimes-horrifying entertainment.

Bears and Seals. We humans have a very odd relationship with bears. On the one hand, we pu

Explanation:

answer; i believe that the correct answer is ; males are hemizygous for the x chromosome;

"d.) carbon dioxide and hydrogen sulfide"