Chap 12: Predation

Which of the following statements about predators and herbivores is true?

a. Only herbivores eat seeds more than any other plant part.

b. All of the above

c. There are few herbivorous insects.

d. A broad diet is more typical of a predator than of an herbivore.

e. none of the above

A broad diet is more typical of a predator than of an herbivore.

Which if the following is an exploitation interaction between species?

a. predation

b. parasitism

c. herbivory

d. All of these

All of these

A brightly colored yellow and red frog that is non-toxic is utilizing what type of adaptation to avoid being eaten?

a. crypsis

b. false advertising mimicry

c. warning coloration

d. physical defenses

false advertising mimicry

In a predator‒prey system functioning according to Lotka‒Volterra dynamics, an increase in the efficiency (b) by which prey biomass is converted into predator biomass should _______ the long-term average number of prey.

a. decrease

b. slight increase

c. strong increase

d. no effect

decrease

If an organism wants to maximize their nitrogen (N) intake, they would be wise to preferentially feed on______, because it has the highest N content of the options listed below.

a. sap

b. animals

c. leaves

d. seeds

animals

Moths resting on the trunks of trees often resemble the tree bark so that potential predators do not perceive them as prey. This is an example of

a. crypsis

b. an induced defense

c. aposematic coloration

d. silencing

crypsis

If shell thickness is directly related to handling time of a snail by a predator, and inversely related to their avoidance response when predators are present, which species do you predict must have the thickest shell, based on the data provided?

a. Gibbula umbilicalis

b. Littorina littorea

c. Gibbula cineraria

d. Osilinus lineatus

Gibbula umbilicalis

Insects feeding on the leaves of a plant stimulate the plant to produce more leaves. This is an example of

a. competition

b. aposematism

c. compensation

d. an induced defense

compensation

If lizards constitute 40% of the available food for a heron, yet make-up 80% of the heron diet, the heron must be a ___________ predator.

a. generalist

b. specialist

c. sit and wait

d. searching

specialist

In nature, predator prey populations have an inherent tendency to cycle, rather than predators driving prey populations all the way to extinction.  Which of the following is not a factor that prevents predators from driving prey to extinction?

a. Increased capture efficiency by predators

b. Habitat complexity

c. Limited dispersal by predators

d. Prey switching in predators

Increased capture efficiency by predators

A brightly colored yellow and red frog that is toxic is utilizing what type of adaptation to avoid being eaten?

a. crypsis

b. warning coloration

c. false advertising mimicry

d. physical defenses

warning coloration