Early members of the class Reptilia were the first to produce( ).
A: neotenic larvae
B: amniotic eggs
C: urea as a nitrogenous waste
D: tadpole larvae
E: isolecithal eggs
A: neotenic larvae
B: amniotic eggs
C: urea as a nitrogenous waste
D: tadpole larvae
E: isolecithal eggs
举一反三
- The major nitrogenous waste of bony fishes is ( ). A: ammonia B: urea C: uric acid D: guanine E: creatine
- Eggs were thought to make the voice pretty.
- Eggs were thought ______ the voice pretty in ancient times.
- What are the father’s personal experiences associated with eggs in Sherwood Anderson’s “The Eggs”? A: nurturing eggs in the farm B: serving eggs in the restaurant C: entertaining the guests with eggs at the restaurant D: destroying the eggs then he failed in the Columbus trickery
- —What’s on the plate?—There _____ some eggs and cakes on it. A: is B: are C: was D: were