chapter 22 7th grade science

All of the following are examples of limiting factors for a population except...

• space
• food
• time
• weather

In which type of interaction do both species benefit?

• predation
• mutualism
• commensalism
• parasitism

Which of these relationships is an example of parasitism?

• a bird building a nest on a tree branch
• a bat pollinating a saguaro cactus
• a flea living on a cat's blood
• ants protecting a tree that produces the ants' only food

In general, which of the following is a true statement about population size?

• If birth rate < death rate, population size increases
• If death rate < birth rate, population size decreases
• If birth rate > death rate, population size increases
• If death rate > birth rate, population size increases

Which of the following lists the levels of organization in an ecosystem from the smallest unit to the largest?

• population, organism, community, ecosystem
• organism, population, ecosystem, community
• organism, community, population, ecosystem
• organism, population, community, ecosystem

All the living and nonliving things that interact in a particular area make up a(n)

• ecosystem
• population
• community
• biome

All the different populations that live together in an area make up a(n)

• ecosystem
• community
• habitat
• organism

Counting hawks with and without bands on their legs is

• direct observation
• indirect observation
• sampling
• mark and recapture

Counting the number of nests in an area is an example of

• direct observation
• indirect observation
• sampling
• mark and recapture

A symbiotic relationship in which one species benefits and the other is harmed

• mutualism
• predation
• commensalism
• parasitism