Biology help please??????
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Biology help please??????

[From: ] [author: ] [Date: 11-05-11] [Hit: ]
In commensalism, one species benefits and the other neither benefits nor is harmed.Increases in greenhouse gases cause increases in global temperature because these gases are able to trap heat reradiated from Earths surface.___ is a scientific discipline that develops practical approaches to prevent extinction of species and destruction of ecosystems.Biogeography-1.B 2.......
In a lake, the epilimnion is the:


environment found close to shore in a lake

environment found at the lake bed

lower, colder layer

upper surface layer



Which of the following describes organisms in a pelagic zone?

plankton floating near the ocean surface

bottom-dwellers on the ocean floor

barnacles glued to stone in an intertidal zone

frogs in a pond close to the pond's edge



Which of the following is NOT an example of secondary succession?


farmland is abandoned

a forest is clear cut

a lava flow covers the landscape

a wildfire burns away the vegetation on a hillside



Phosphate ions are primarily made available to organisms through:


combustion of fossil fuels

decomposition of plants

evapotranspiration

weathering of rocks



The rigid, outer layer of Earth is referred to as the asthenosphere.


True
False


In commensalism, one species benefits and the other neither benefits nor is harmed.

True
False



Increases in greenhouse gases cause increases in global temperature because these gases are able to trap heat reradiated from Earth's surface.


True
False


___ is a scientific discipline that develops practical approaches to prevent extinction of species and destruction of ecosystems.


Ecology

Environmentalism

Conservation Biology

Biogeography

-
1.B 2.B 3.A 4.C 5.True 6.False 7.True 8.C
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