Ecologists who study the way many species interact

Ecologists who study the way many species interact with each
other in a specified area are focused on:
Question options:
habitats.
communities.
niches.
biomes.
2.5 / 2
point
As demonstrated by the Keeling curve, carbon dioxide
concentration in the atmosphere was expected to reach
__________ ppm by 2010. But, in fact, carbon concentration
exceeded that level in 2013 and is still rising.
2.5 / 2

point
Phytoplankton, aside from being the base of the oceanic food
chain, produce __________ percent of our planet's atmospheric
oxygen.
Question options:
20
30
40
50
n 2.5 / 2
point
Which of the following statements characterizes temperate
grasslands?
Question options:
The rainy season lasts for six to eight months.
During the parched dry season, fires, intended and natural, turn vegetation to ash.
We find perennial grasses as well as flowering plants called forbs.
We find stands of trees separated by grasses.
2.5 / 2
point
Among the types of desert biomes, where would you find a
cold desert?
Question options:
Along the coast of Chile
Along the coast of Morocco
Utah or Montana
Greenland
2.5 / 2
point
Chlorofluorocarbons (CFCs), the main culprit in the depletion
of atmospheric ozone, are being replaced with
hydrofluorocarbons (HFCs), thus greatly reducing ozone layer
depletion. What is the only drawback to this strategy?
Question options:

n 2.5 / 2
point
According to the EPA, the second most significant factor in
human-caused global warming and climate change is:
2.5 / 2
point
The actual location of some natural space inhabited by
particular flora and fauna is called a/an:
Question options:
habitat.
ecoregion.
community.
ecosystem.
2.5 / 2
point