Question

Most organisms are dependent upon plants because

		plants produce oxygen as a by-product of photosynthesis.
		as producers, they form the base of food chains.
		they function to prevent erosion and reduce desertification.
		as they remove carbon dioxide from the atmosphere, they reduce the problems generated by the greenhouse effect.
		all of these apply.

2.5 points   

QUESTION 2

Hover flies like to drop in at outdoor picnics to sample the sweets, but the reaction of humans is to flee the scene because of the flies' uncanny resemblance to bees. Thus the survival of Hover flies is enhanced by

		mimicry.
		display behavior.
		warning coloration.
		chemical defenses.
		camouflage.

2.5 points   

QUESTION 3

In which of the following ways does the fly kill a fire ant?

		A female fly lays an egg in the ant's soft tissues, and in the process of development, the resulting larvae kills the ant.
		A fly (male or female) injects a poisonous substance in the ant which results in paralyzing its muscles.
		A fly (male or female) injects a substance that sterilizes the ant.
		A fly (male or female) causes the ant's death by depriving it from its necessary resources and habitat.
		A fly (male or female) injects a substance that sterilizes the ant and paralyzes its muscles.

2.5 points   

QUESTION 4

In a natural community, the primary consumers are

		herbivores.
		carnivores.
		detritivores.
		decomposers.
		producers.

2.5 points   

QUESTION 5

The mycorrhizal relationship you studied in a previous chapter is an example of

		commensalism.
		mutualism.
		competition.
		predation.
		parasitism.

2.5 points   

QUESTION 6

Decomposers perform their recycling efforts on organisms

		at the end of a food chain.
		on the top of a pyramid.
		that are producers.
		that are consumers.
		that are all of these.

2.5 points   

QUESTION 7

Which of the following is not a greenhouse gas?

		methane
		nitrogen gas
		carbon dioxide
		nitrous oxide
		chlorofluorocarbon

2.5 points   

QUESTION 8

An aquifer is most closely related to

		sea water.
		lake water.
		stream water.
		glacial water.
		groundwater.

2.5 points   

QUESTION 9

Which of the following is the most inclusive?

		organism
		community
		ecosystem
		population
		organ system

2.5 points   

QUESTION 10

Two species of closely related squirrels both feed on acorns produced by oak trees. One species feed exclusively near the top of the tree and the other feeds exclusively towards the bottom of the tree. This is an example of

		competitive exclusion.
		resource partitioning.
		mutualism.
		commensalism.
		mimicry.

Answer 1

1. Answer: e

All the options apply

2. Answer: a

Hover flies are brightly colored, with spots, stripes, and bands of yellow or brown covering their bodies. Due to this coloring, they are often mistaken for wasps or bees; they exhibit Batesian mimicry. Despite this, hoverflies are harmless.

3. Answer: a

The fly hovers over fire ants then inject their eggs into the ants with a needle-like appendage. The egg grows and the resulting larva generally migrates to the ant's head. The larva lives there for weeks--slurping up the brain .Finally, the baby fly decapitates its host and hatches, exiting through the ant's head

4. Answer: a

In a natural community the primary consumers are herbivores. Carnivores are secondary consumers.