Metazoa

Question 1

“Meta” means _____ and “Zoa” means ______

Answer 1

“Complex” ; “Life Form”

Question 2

There are over ______ formally described species in Metazoa

Answer 2

2 million

Question 3

How many major phyla for animals

Answer 3

35

Question 4

Most Metazoa are

Answer 4

Arthropods

Question 5

Less than 5% of Animals are

Answer 5

Vertebrates

Question 6

Opisthokonts

Answer 6

Eukaryotes with a posterior flagella

Question 7

Closest single celled relative to Metazoa are

Answer 7

Choanoflagellates

Question 8

Choanoflagellates

Answer 8

Closest living relatives of animals

Question 9

8 Key Features of Metazoans

Answer 9

-multicellular
-cellular differentiation
-cell to cell communication
-heterotrophic
-motile
-homeostasis
-diploids (meiosis at reproduction)
-embryonic stage

Question 10

Heterotrophic

Answer 10

Nutrients are derived from other organisms

Question 11

Choanocytes occur in

Answer 11

Sponges

Question 12

Simplest animal are the

Answer 12

Sponges

Question 13

Animal Phylogenetic Relationships are determined by 4 factors

Answer 13

-comparative morphology
-comparisons of embryology
-fossil record
-molecular sequence alignments

Question 14

Molecular comparison reveals similarities between

Answer 14

Choanoflagellates and Animals