help me 1 hour help me

Jul 22nd, 2015
Anonymous
Category:
Biology
Price: $10 USD

Question description

A species that influences the survival of many other species in an ecosystem is called a(n)

a.

niche species.

b.

extinct species.

c.

keystone species.

d.

endangered species.


Please select the best answer from the choices provided



If all members of a species disappear from Earth, the species is said to be

a.

extinct.

b.

endangered.

c.

threatened.

d.

keystone.


Please select the best answer from the choices provided



Yellowstone National Park, the world’s first national park, is an example of

a.

captive breeding.

b.

habitat preservation.

c.

habitat destruction.

d.

poaching.


Please select the best answer from the choices provided



A species that influences the survival of many other species in an ecosystem is called a(n) _________________________.

a.

biome

c.

omnivore

b.

keystone species

d.

decomposer


Please select the best answer from the choices provided



An organism that is in danger of becoming extinct is said to be _______.

a.

threatened

b.

endangered

c.

disappearing

d.

hidden


Please select the best answer from the choices provided



All of the following are threats to biodiversity EXCEPT

a.

habitat destruction.

b.

gene pool diversity.

c.

pollution.

d.

exotic species.


Please select the best answer from the choices provided



The most diverse ecosystems on Earth are

a.

tropical rain forests.

b.

coral reefs.

c.

deep-sea areas.

d.

fisheries.


Please select the best answer from the choices provided



Which of these activities can threaten biodiversity?

a.

habitat preservation

b.

resource conservation

c.

increase in pollution

d.

having a variety of niches


Please select the best answer from the choices provided



Which of the following does NOT preserve biodiversity?

a.

captive breeding

b.

laws to protect species

c.

establishing wildlife preserves

d.

poaching endangered species


Please select the best answer from the choices provided



All of the following factors affect an area’s biodiversity EXCEPT

a.

area.

b.

number of endangered species.

c.

climate.

d.

diversity of niches.


Please select the best answer from the choices provided


Tutor Answer

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