Relationships in Ecosystems Review

Relationships in Ecosystems Review

Multiple Choice

How are changes in populations related to the availability of an ecosystem's resources?

• Large populations need the same amount of resources as small populations.

• As populations grow, ecosystems produce more resources in order to support the larger population.

• Population sizes are limited by the amount of resources that are available.

• Changes in population are independent of the availability of an ecosystem's resources.

Multiple Choice

Which of the following would most likely limit the number of mice in an ecosystem?

• an increase in the amount of vegetation (food)

• a decrease in the number of owls (predators)

• a disease that infects baby mice

• an increase in the amount of space available

Multiple Choice

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

• community

• biome

• ecosystem

• biosphere

Multiple Choice

Which of the following is an example of an abiotic factor in an ecosystem?

• roots

• grass

• birds

• sunlight

Multiple Choice

What is the definition of abiotic?

• non-living things in the ecosystem

• producers

• the place in an ecosystem where an organism lives

• population

Multiple Choice

What is the definition of biotic?

• living things in an ecosystem

• nonliving things in an ecosystem

• a characteristic that helps an organism survive and reproduce in its environment

• squirrels

Multiple Choice

In this food web, which animals are in competition?

• Hawks and coyotes

• Squirrels and hawks

• Antelopes and squirrels

• Hawks and mountain lions

Multiple Choice

True or False: The population size of predators are equal to the population size of prey.

• True

• False

Multiple Choice

A tapeworm lives in human intestines absorbing the nutrients that would normally be absorbed by the person.  This eventually causes the person to experience health problems.  This relationship is -

• predator/prey
• parasite/host
• herbivore/omnivore
• consumer/producer

Multiple Choice

An organism that creates its own food through the process of photosynthesis is called a -

• decomposer
• prey
• consumer
• producer

Multiple Choice

Which of these populations is most likely to decrease if the number of grasshoppers decreases?

• plants
• frog
• praying mantis
• owl

Multiple Choice

Plants need light, water, and carbon dioxide for photosynthesis.  This is an example of an organism interacting with -

• biotic factors
• food webs
• abiotic factors
• dominant factors

Multiple Choice

What is prey?

• An organism that is consumed
• An organism that consumes
• neither

Multiple Choice

What is a predator?

• Neither
• An organism that is consumed
• An organism that does the consuming

Multiple Choice

Fleas and ticks are examples of what?

• predators
• prey
• hosts
• parasites

Multiple Choice

What is the type of symbiotic relationship that helps one organism, but does not harm or help the other?

• parasitism
• mutualism
• commensalism
• symbiosis

Multiple Choice

What is the organism that is harmed in a parasitic relationship?

• parasite
• host
• consumer
• producer

Multiple Choice

What is mutualism?

• One organism benefits greatly and the other is not harmed

• One organism benefits while the other is harmed

• Close relationship where both organisms benefit

Multiple Choice

What is mutualism?

• One organism benefits greatly and the other is not harmed

• One organism benefits while the other is harmed

• Close relationship where both organisms benefit