California State University, Northridge BIO 101 Chapter 23 1)The skin and nervous tissues develop from which germ layer?   2

California State University, Northridge

BIO 101

Chapter 23

1)The skin and nervous tissues develop from which germ layer?

2.            Clams are examples of bivalve mollusks, characterized by their 

3.            A multicellular organism that lacks cell walls and obtains energy by eating other organisms is a(n):

4.            Earthworms are annelids, characterized by their                  

5.            In the animal kingdom, cephalization is:

6.            One difference between centipedes and millipedes is that         

7.            A sea anemone is an example of an animal with               

8.            The only animals that lack tissues are:

9.            Which of the following are features of animals?

12.          Which of these animal groups is characterized by having a true coelom?

13.          Between the organs and the body wall, complex animals have a body cavity called a:

14.          Spiders are examples of              

15.          Sponges have:

16.          One trend in the evolution of animals is the increase in the number of tissue (germ) layers during embryonic development. Flatworms and more complex animals have          layers.

17.          Animals are thought to have first appeared approximately           years ago

18.          Damage to the embryonic ectoderm would show up as damage to which adult body tissues?

19           Which germ layer gives rise to the muscle layer of the uterus?

20           Match the animal with its phylum

21           The simplest multicellular animals that have only a few different cell types are: