1st Semester Test Part 3: Question Preview (ID: 28005)

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If a population becomes so low that the species is at risk of having no individuals remaining, it is considered to be which of the following?
a) extinct
b) threatened
c) predated
d) endangered

Which of the following is a reason an animal population moves from one place to another?
a) too few predators in an area
b) too plentiful of a food supply
c) overpopulation
d) Shelter in the original area is readily available.

In which biome does drilling for oil and gas interrupt migration patterns?
a) desert
b) taiga
c) tundra
d) grassland

When do populations increase?
a) When birthrates are smaller than deathrates.
b) When deathrates are higher than birthrates.
c) When birthrates are higher than deathrates.
d) When birthrates and deathrates are equal.

Human activities have which type of impact on the environment?
a) positive
b) negative
c) both positive and negative
d) neither positive nor negative

Which natural disaster is made worse when people destroy estuaries?
a) flooding and storm damage
b) earthquake
c) tornados
d) drought

Why have people cleared so much of Earth’s tropical rain forests?
a) lumber
b) ranches
c) farms
d) all of the above

What is the main way people have reduced habitats for wild species in grasslands?
a) making roads
b) all of the above
c) building homes
d) plowing the land for cereal crops

Which is a model of feeding relationships?
a) protein building
b) food web
c) food map
d) sugar molecules

Which of the following organisms would NOT be in the first trophic level of an energy pyramid?
a) dog
b) grass
c) tree
d) flower

A healthy community could have _____.
a) a variety of producers and consumers
b) only organisms that were consumers
c) organisms that all had the same niche
d) only organisms that were producers only

As you move upward, from level to level, in an energy pyramid, energy ____.
a) stays at the same level
b) decreases
c) increases
d) is destroyed

What is one reason that a food web might be a better description of an ecosystem than a food chain?
a) Animals have only one option of what to eat.
b) At least one animal in the web has webbed feet.
c) No animals are chained.
d) Organisms have a choice of what to eat.

Which of the following nonliving things affects climate and temperature?
a) the Sun
b) rain
c) the Moon
d) wind

About 30 to 50 percent of all species are found _____.
a) on farms
b) on the prairie
c) in the ocean
d) in rain forests

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