Chapter 8 Test Review #2

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.

Which of the following is not an example of exponential growth?

• rabbit populations after being introduced to Australia

• reindeer of the Pribilof Islands after eating most of the lichens

• a bank account that earns interest

• mold appearing on bread overnight

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

• number of individuals in the species.

• distribution of the population.

• reproductive potential of the species.

• supply of the most limited resources.

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

• The orchids draw nourishment from the trees.

• The trees are neither benefited nor harmed.

• The orchids keep parasites away.

• The trees receive nutrients from the orchids.

Which of the following statements is not correct?

• Mutualism is a type of symbiosis.

• Yucca moths and yucca plants have a symbiotic relationship.

• Symbiosis is a relationship in which two organisms live apart.

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

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

• number of individuals

• color of individuals

• number of species

• kind of adaptations

Which of the following statements is correct?

• An organism’s niche is only the part of its habitat that it eats.

• An organism’s habitat is a location.

• Habitat and niche are the same thing.

• An organism’s niche is outside its habitat.

Competition for food cannot occur

• between two populations.

• among members of the same population.

• among populations whose niches overlap.

• between animals from two different ecosystems.

Which of the following reproductive situations will limit a population’s biotic potential?

• the minimum number of offspring each pair can produce

• the maximum number of offspring each individual can produce

• the number of interactions each individual has

• the size of offspring each individual can produce

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

• usually kills and eats its prey.

• benefits from another organism.

• lives in or on a host.

• harms another organism.