Which of the following animals are triploblasts?

Question

Sponges, corals, cats, spiders, birds, or elephants

 

Answer 1

Cats, spiders, birds and elephants are all triploblasts due to having three primary germ layers instead of two, like diphoblasts (including coral). One easy way to remember this is three germ layers -> three -> tri (like in triploblasts) and di->two -> as in diphoblasts’ two germ layers.