Question

1. In which of the following would we expect to have the longest food chains?

a. An eutrophic lake

b. A coastal upwelling region

c. A subtropical gyre

d. In the gut of a shark

e. An estuary

f. A desert

2. Tompkins County has a large deer population. In fact, there are an ever-increasing number of car accidents caused by people hitting deer. You are a wildlife manager charged with reducing the number of deer over the next 50 years. Which of the following actions would be most likely to reduce the total number of deer?

a. Double the number of hunting permits for the first 10 years. (Increase Deaths)

b. Have 10 “doe only” hunting seasons for the first 5 years. (Decrease Births)

c. Stop all farming in the county (Decrease K)

d. Put out 50 bait stations that contain chemicals that act as contraceptives (Decrease r)

e. Intensively measure the population using multiple measures including mark recapture.

3. Two species of birds live in Tompkins county, NY. They both live in the same forests and compete for nesting space in cavities found in dead trees. One species consumes insects. The other species consumes seeds. The species that consumes insects is twice the size of the seed-eating species. Which of the following best describes this interaction?

a. Interspecific and interference competition

b. Interspecific and exploitation competition

c. Interspecific competition but there is not enough information to know if it is interference or exploitation competition

d. Exploitation competition but there is not enough information to know if it is intraspecific or interspecific

e. Interference competition but there is not enough information to know if it is intraspecific or interspecific

f. None of the above

4. A species of grass is consumed by zebras in Kenya. The grass species has evolved such that it stores a great deal of energy in its roots. This allows it to produce massive amounts of growth and seeds and outcompete nearby forbs (other kinds of plants) after the area it lives in is grazed on by zebra (this adds up to higher fitness). Which of the following best represents the relationship between the grass and the zebra?

a. Exploitation

b. Competition

c. Commensalism

d. Amensalism

e. Mutualism

f. Neutralism

Answer 1

1) C, A subtropical gyre, have largest biome on the earth.

2) D Put out 50 bait stations that contain chemicals that act as contraceptives (Decrease r). We can't decrease K as other species will get afected due to this.

3) C, Interspecific competition but there is not enough information to know if it is interference or exploitation competition BECAUSE Interference or exploitation competition both happen for resources not for the space.

4) C, Commensalism , Here grass have no effect. grass can grows after grazing because its energy saves into grass roots. zabra is profited because zabra feed on grass for intake of energy.