Question 1

-The greatest terrestrial net primary production can be seen to occur________.

Accepted Answer

The answer of  
-The greatest terrestrial net primary production...

Question 2

Net ecosystem production values (NEP) will always be positive as a result of________.

Accepted Answer

Net ecosystem production (NEP) is the difference between gross primary production (GPP) and ecosystem respiration. During succession, high GPP and increases in biomass contribute to positive NEP values.

Question 3

Most organisms feed on something in their ecological community. Match the organism with what they feed on or live on in the ecosystem.
-Consumer

Accepted Answer

Consumers feed on other living organisms in their ecological community.

Question 4

Most organisms feed on something in their ecological community. Match the organism with what they feed on or live on in the ecosystem.
-Predator

Accepted Answer

Predators hunt and kill animals for food as part of their role in the ecosystem.

Question 5

Most organisms feed on something in their ecological community. Match the organism with what they feed on or live on in the ecosystem.
-Herbivore

Accepted Answer

Herbivores are organisms that feed on plants.

Question 6

Most organisms feed on something in their ecological community. Match the organism with what they feed on or live on in the ecosystem.
-Vector

Accepted Answer

Vectors are organisms that carry parasites or pathogens from one host to another, facilitating the spread of diseases.

Question 7

Most organisms feed on something in their ecological community. Match the organism with what they feed on or live on in the ecosystem.
-Parasite

Accepted Answer

Parasites live on plants and animals, deriving nutrients at the host's expense, but typically do not kill them.

Question 8

Read the scenario and answer the accompanying questions.
 In the late 1800s the federal government began eradicating the grey wolf from Yellowstone because of fear that the wolf population would have a negative impact on the area's elk, which were considered a more desirable species at that time. The eradication of this keystone species continued until the 1930s, when wolves were effectively eliminated from the lower 48 states. In the absence of wolves, elk populations begin to explode and that, in turn, resulted in what has become known as a trophic cascade. Use this information to answer the following questions on the effects of keystone species eradication and the resulting trophic cascade.
-With an overabundance of elk, the next population in the Yellowstone ecosystem to be directly affected was/were _________.

Accepted Answer

The overabundance of elk led to overgrazing, which directly affected plant species by reducing their abundance and diversity.

Question 9

Read the scenario and answer the accompanying questions.
 In the late 1800s the federal government began eradicating the grey wolf from Yellowstone because of fear that the wolf population would have a negative impact on the area's elk, which were considered a more desirable species at that time. The eradication of this keystone species continued until the 1930s, when wolves were effectively eliminated from the lower 48 states. In the absence of wolves, elk populations begin to explode and that, in turn, resulted in what has become known as a trophic cascade. Use this information to answer the following questions on the effects of keystone species eradication and the resulting trophic cascade.
-What was the primary reason that the beaver and songbird populations were also diminished from the area?

Accepted Answer

The increased elk population led to overgrazing, which reduced the availability of plants that beavers and songbirds relied on for food and habitat.

Question 10

The distinguished ecologist G. Evelyn Hutchinson provided one of the most important explanations for how competing species can coexist. Explain his fundamental niche concept, and how he would account for closely related species coexisting.

Accepted Answer

The answer of The distinguished ecologist G. Evelyn Hutchinson provided...

Question 11

Explain the two major processes that drive the normal functioning of the carbon cycle, and then discuss two ways in which humans have negatively impacted this cycle.

Accepted Answer

The answer of Explain the two major processes that drive...

Quiz 2: Organism and Population Ecology and Evolution, Human Population Growth, and Communities and Ecosystems

-The greatest terrestrial net primary production can be seen to occur________.

Net ecosystem production values (NEP) will always be positive as a result of________.

Most organisms feed on something in their ecological community. Match the organism with what they feed on or live on in the ecosystem. -Consumer

Most organisms feed on something in their ecological community. Match the organism with what they feed on or live on in the ecosystem. -Predator

Most organisms feed on something in their ecological community. Match the organism with what they feed on or live on in the ecosystem. -Herbivore

Most organisms feed on something in their ecological community. Match the organism with what they feed on or live on in the ecosystem. -Vector

Most organisms feed on something in their ecological community. Match the organism with what they feed on or live on in the ecosystem. -Parasite

The distinguished ecologist G. Evelyn Hutchinson provided one of the most important explanations for how competing species can coexist. Explain his fundamental niche concept, and how he would account for closely related species coexisting.

Explain the two major processes that drive the normal functioning of the carbon cycle, and then discuss two ways in which humans have negatively impacted this cycle.