1. Which of the following organisms excrete urea?

Select one:

a. Bony fish

b. Mammals

c. Insects

d. Reptiles

e. Birds

2. Where in the body are carbon dioxide levels in the highest concentration?

Select one:

a. The pharynx

b. The trachea

c. The alveoli

d. The tissue cells

e. The larynx

3. What is the outer portion of the kidney?

Select one:

a. The renal medulla

b. The renal nephron

c. The renal pelvis

d. The renal cortex

e. The renal collecting duct

4. Which of the following would not be considered a density-dependent factor controlling population size?

Select one:

a. Drought

b. Predation

c. Parasites

d. Disease

e. Competition

5. Steroid hormones can be produced by ________.

Select one:

a. The pituitary gland

b. The thyroid gland

c. The ovaries

d. The parathyroid gland

e. The pineal gland

6. What disorder is caused by hypothyroidism?

Select one:

a. Cushing syndrome

b. Diabetes type 1

c. Diabetes type 2

d. Goiters

e. Sleep disorders

7. If you were studying the mature female gametophyte of a flowering plant, you would be studying the ________.

Select one:

a. stigma

b. style

c. pollen grain

d. zygote

e. embryo sac

8. Which of the following are biotic factors that affect population size?

Select one:

a. Logistical-dependent factors

b. Carrying capacity-dependent factors

c. Density-dependent factors

d. Density-independent factors

e. Biotic-independent factors

9. What protective membranes wrap around the brain and spinal cord?

Select one:

a. meninges

b. corpus callosum

c. cerebrospinal membranes

d. ventricles

e. hippocampus

10. What occurs during contraction?

Select one:

a. Thin filaments become shorter

b. Thin filaments become longer

c. Thick filaments become shorter

d. Thick filaments become longer

e. None of these are true