Overview of Animal Kingdom

11. Which of the following animal groups lacks a circulatory system?

a) Porifera

b) Nematoda

c) Mollusca

d) Platyhelminthes

12. The respiratory system of fish includes __________.

a) Gills

b) Lungs

c) Tracheae

d) Skin

13. In vertebrates, the excretory system is responsible for removing ___________.

a) Oxygen

b) Nitrogenous waste

c) Carbon dioxide

d) Glucose

14. The largest and most complex part of the brain in vertebrates is the ___________.

a) Medulla oblongata

b) Cerebellum

c) Cerebrum

d) Hypothalamus

15. Which of the following animal phyla is characterized by a segmented body?

a) Platyhelminthes

b) Nematoda

c) Annelida

d) Cnidaria