chapter 8 environmental test

Which of the following statements explains why the growth of orchids on the high branches of tropical trees is an example of commensalism?

The trees are neither benefited nor harmed.

A species of plant has exponential growth after it is introduced into an area where it has never lived. Which statement best describes exponential growth?

Within a few years the population increases dramatically.

Each of the following is an example of a parasite except

a cow in a pasture.

An example of a population is

all maple trees in a forest.

Which of the following organisms has the highest reproductive potential?

bacteria

Competition for food cannot occur

between animals from two different ecosystems.

A population's growth rate is its ____________________ rate minus its ____________________ rate.

birth, death

The _________________________ of an ecosystem for a particular species is the maximum population that the ecosystem can support indefinitely.

carrying capacity

In which of the following relationships is neither species harmed?

commensalism

A type of interaction between two species in which both species are harmed is ____________________.

competition

A population's ____________________ is the number of its members per unit area or per volume.

density

Deaths that are caused by a disease spreading through a population are ____________________ dependent.

density

The number of wild horses per square kilometer in a prairie is the horse populations

density

A population's ____________________ is usually described as even, clumped, or random.

dispersion

A true statement about parasitism is that parasites

may cause their hosts to become more vulnerable to predators.

The organisms in a cow's stomach have a constant source of food; the organisms help the cow break down and use the grass it eats. This type of relationship is an example of ____________________.

mutualism

The relationship between acacia trees and the ants that live on them is an example of

mutualism

Which of the following is one of the main properties used to describe a population?

number of individuals

The relationship between a Canadian lynx and a snowshoe hare is an example of

predator and prey.

The type of interaction between cats and mice is ____________________.

predidation

If over a long period of time, each pair of adults in a population had only two offspring and the offspring lived to reproduce, the population would

remain the same.

The maximum number of offspring that each member of a population can produce is the population's ______________________________.

reproductive potential

The carrying capacity of an environment for a particular species at a particular time is determined by the

supply of the most limited resources.

A relationship in which two organisms live in close association, such as mutualism and commensalism, is called ____________________.

symbiosis

A female dog's niche includes all of the following except

the neighbor's enclosed yard.

The density of a population is

the number of individuals per unit area.

The difference between a predator and a parasite is that a predator

usually kills and eats its prey.