21) A harmless moth that resembles a poisonous wasp is an example of:

A) mutualism.

B) commensalism.

C) Batesian mimicry.

D) Müllerian mimicry.

22) For a parasite living in human skin, the person is the:

A) prey.

B) victim.

C) mimic.

D) host.

23) When faced with a threat, gopher snakes and bull snakes, who have markings similar to rattlesnakes, will “rattle” their tails in brush to sound like a rattlesnake. In this case, the gopher and bull snakes are mimics, and the rattlesnake is the:

A) predator.

B) prey.

C) model.

D) commensal.

24) You are doing field work on a small, uninhabited island. You are supplementing your food supply with fish that live in some of the ponds on the island. You catch a brightly colored fish with red and black stripes, filet it, pan fry it, and spit out your first bite because it tastes like it had been soaked in urine. Back at camp, your guide from a nearby island is pan frying fish with red and black stripes he caught in an adjacent pond. When you tell him not to eat those, he smiles and says these are the best-tasting fish in the whole island chain! You look closer and see the pattern of the red and black stripes is just a little different from the fish you caught.What principle of ecology have you just experienced firsthand?

A) commensalism

B) mutualism

C) Müllerian mimicry

D) Batesian mimicry

25) The Venus flytrap, a carnivorous plant, might be considered a:

A) parasite.

B) predator.

C) mutualistic plant.

D) pioneer.

26) Two moths with similar markings each produce a chemical that makes their bird predators sick to their stomach if eaten. Which principle of ecology does this demonstrate?

A) commensalism

B) mutualism

C) Müllerian mimicry

D) Batesian mimicry

27) An interaction in which one species benefits and the other is not affected is classified as:

A) commensalism.

B) mutualism.

C) coevolution.

D) competition.

28) Which of the following is an example of coevolution?

A) the reliance of flowers and bees on each other

B) the visual acuity of eagles and hawks

C) the development of a watertight seed

D) the ability of plants to use sunlight to make their own fuel

29) Many plant species produce flowers of a certain color and shape to attract honeybees. These plants produce nectar, and the bees transport pollen from one plant to another while searching for nectar. This is an example of:

A) succession.

B) predation.

C) commensalism.

D) mutualism.

30) Many bromeliads are epiphytes on the bark of tropical trees. They do not tap into the vascular system of the trees, but they collect the nutrient-rich water that drips through the canopy of the trees. This is an example of:

A) predation.

B) succession.

C) mutualism.

D) commensalism.