Exam 15: Predation

Which animal does not employ protective armor for predator defense?

The sigmoidal relationship between prey density and per capita predation rate in a type III functional response can be explained by all of the following factors,except

The ________ value theorem predicts the length of time an individual should stay in a resource patch before leaving and seeking another.

The cycle of change in the size of predator and prey populations in response of one to the other is known as ________.

In a graph that plots prey population (Nprey)on the x-axis against the number of predator offspring produced per unit of time on the y-axis,the slope represents the

In the basic Lotka-Volterra equations that describe predator-prey interactions,the growth rate of the prey population (dNprey / dt)is zero when the density of predators (Nprey)is equal to

Carnivores can have an indirect,positive effect on plants by reducing populations of herbivores.

________ mimicry occurs when a nontoxic species closely resembles a toxic species,both of which are avoided by predators.

Acoustic mimicry by some nonvenomous snakes that rattle their tails like rattlesnakes is a form of Mullerian mimicry.

One explanation for the shape of the type II functional response is that predators develop a search image for prey after they have encountered them.

A shift in the phenotype of individual prey,induced by the presence and activity of predators,is termed ________.

In the Lotka-Volterra models of predator-prey interactions,prey density does not influence predator mortality.

Many plants use ________ defenses,such as hairy leaves,thorns,or spines to deter herbivory.

Quantitative inhibitors

The relationship between the per capita rate of consumption and the number of prey is known as the predator's ________ response.

Most grasses tolerate grazing and actually benefit from it.

Which of the following is a positive numerical response made by a predator in response to an increase in prey density?

________ defenses are not permanently present but,rather,are brought about by the presence or action of predators.

Most predators are also ________ to other predatory species.

A(n)________ is an organism that lives on or within another without killing the host.