8.L.3.1 ECOSYSTEMS Question Preview (ID: 46641)


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Which of these is an abiotic element of a desert ecosystem?
a) sand
b) cactus
c) lizard
d) scorpion

An aquarium, containing 10 fish gains 10 more fish. What is most likely to happen to the fish?
a) They will thrive because of the additional fish.
b) They will suffer because the space is not increased.
c) They will suffer because the water will be too warm with so many fish.
d)

“Lions are predators to antelopes in many African ecosystems.” Which is best being described?
a) a population shift
b) an abiotic factor
c) the lion’s niche
d)

What term describes how a species meets its need for food and shelter and how it reproduces?
a) niche
b) habitat
c) environment
d)

Which are major abiotic factors that determine the types of plants that can grow in an ecosystem?
a) birds and bees
b) precipitation and bees
c) precipitation and temperature
d)

When space is limited in an ecosystem, how is a bird population most likely affected?
a) competition decreases
b) survival rate increases
c) availability of food increases
d) availability of nesting spots decreases

Which is the place where a member of a population lives and finds food?
a) space
b) habitat
c) shelter
d) population

Under which condition would a population most likely increase?
a) The carrying capacity exceeds the habitat area.
b) The number of deaths exceeds the immigration rate.
c) The number of deaths exceeds the number of births.
d) The amount of available resources exceeds the carrying capacity.

Some caterpillars need big wide leaves to wrap up in when undergoing metamorphosis. Which is the limiting factor when there is a shortage of this kind of leaf?
a) food
b) shelter
c) space
d) water

Mice, rabbits, bobcats, and squirrels all live in a brush ecosystem. Which animal would have the most difficult time surviving if the population of the other three animals continued to decrease?
a) mouse
b) squirrel
c) bobcat
d) rabbit

In a forest ecosystem food chain if the green plants are destroyed in a forest fire, which short-term effect will this have on the organisms in this food chain?
a) There would be fewer rabbits for the coyotes to eat.
b) The mountain lions would have to begin to eat green plants.
c) There would be an increase in the coyote population
d) There would be more green plants for the rabbits to eat.

When would water be a limiting factor in an ecosystem?
a) when a population is small
b) when a population is decreasing
c) when a population contains many predators
d) when a population is approaching the carrying capacity

Which does every organism in an ecosystem need for survival?
a) animals
b) plants
c) water
d) soil

Which best describes the carrying capacity in an ecosystem?
a) the number of organisms moving in and out of a population
b) the amount of habitat areas that are available in a given area
c) the amount of resources that are needed by a population of organisms
d) the number of individual organisms the environment can support in a given area

Estuaries often have marsh grasses that act as a safe nursery for young fish. Which limiting factor, provided by estuaries, does this describe?
a) food
b) space
c) shelter
d) predators

If the primary food source for the whale population in an area is depleted, which will most likely happen?
a) The whale population will stabilize.
b) The whale population will increase.
c) Competition among the whales will increase.
d) Starvation will cause the whales to become extinct.

Which best determines the number of wolves that can live in an area?
a) the amount of snow in the area each year
b) the number of birds that live in the area
c) the number of trees in the area
d) the amount of food available in the area

If wolves prey on deer for food, what will most likely happen to the deer population if wolves are removed from an area where deer live?
a) The population of deer will increase.
b) The population of deer will decrease.
c) The population of deer will remain the same.
d) The population of deer will become extinct.

Which best describes the limiting factors on a population in an ecosystem?
a) food, shelter, space, water
b) food, shelter, sunlight, water
c) food, carbon dioxide, shelter, water
d)

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