Which of the following patterns in animal evolution is correct?

1)What is a key difference between holometabolous and hemimetabolous metamorphosis?
a)Hemimetabolous larvae often do not feed.
 b)Hemimetabolous juveniles do not directly compete for food with adults.
 c)Holometabolous larvae do not directly compete for food with adults.
 d)Holometabolous larvae appear the same as adults.


2)Which of the following patterns in animal evolution is correct?
 a)All triploblasts have a coelom.
 b)All bilaterally symmetric animals are triploblastic.
 c)All triploblasts evolved from an ancestor that had a coelom.
 d)Sponges have epithelial tissues that line an enclosed, fluid-filled body cavity.

3) In a "tube-within-a-tube" body plan, what is the interior tube?
 a)the gut
 b)ectoderm
 c)mesoderm
 d)either the coelom or the pseudocoelom

4) What is the key difference between choanoflagellates and sponges?
 a)Choanoflagellates are strictly aquatic.
 b)Sponges are multicellular.
 c)Sponges are asymmetrical and do not have tissues.
 d)Choanoflagellates have distinctive flagellated cells that function in suspension feeding.

5)Which protostome phylum is distinguished by having body segments organized into distinct regions?
 a)Arthropoda
 b)Nematoda
 c)Annelida
 d)Mollusca