8 Test Practice

An example of a population is

• all trees in a forest.

• all maple trees in a forest

• all plants in a forest

• all animals in a forest.

Each of the following is an example of a parasite except

• mistletoe on a tree

• a cow in a pasture

• a tick on a cat

• a roundworm in a human’s intestine.

In which of the following relationships is neither species harmed?

• predation

• parasitism

• competition

• commensalism

Which of the following would most likely cause a large number of density-independent deaths in a population?

• disease-carrying insects

• predators

• limited resources

• winter storms

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?

• Each individual plant grows much larger than usual

• The population immediately decreases

• Within a few years the population increases dramatically

• The species’ reproductive potential declines.

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

• dispersion.

• size

• birth rate

• density

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

• shrink

• remain the same

• grow

• disperse randomly

A true statement about parasitism is that parasites

• may cause their hosts to become more vulnerable to predators

• do not live on or in their hosts’ bodies

• are always animals and never plants

• immediately kill their hosts

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

• number of individuals in the species

• reproductive potential of the species

• distribution of the population

• supply of the most limited resources.

Which of the following statements is not correct?

• Mutualism is a type of symbiosis

• Coyotes and foxes are competitors because they feed on the same kinds of animals.

• Yucca moths and yucca plants have a symbiotic relationship

• Symbiosis is a relationship in which two organisms live apart