Question

Which human activity is correctly paired with the greenhouse gas that it increases?
rice cultivation and water vapor
landfilling and carbon dioxide
deforestation and methane
sewage treatment and nitrous oxide
A fish has armored plates that enable it to handle the extreme pressure in the deepest, darkest aquatic ecosystem.

Where is this fish adapted to live?

a pond
the open ocean
the neritic zone
an estuary
How would an increase in nest sites affect a population of pigeons?
The population would decrease.
The population would increase.
The population would remain almost the same.
The population would be reduced the next year.
Which organism obtains its energy exclusively from dead or decaying matter?
groundhog
bacteria
daisy
human
Read the following excerpt about water availability to living organisms.

“Water covers 75 percent of Earth. 97 percent of water on Earth is salt water. Only 3 percent of water is available as fresh water, but most of this water is locked up in solid glaciers and polar ice caps.”

Based on this information, which is the best approximation of the amount of water on the planet that is available for animals to drink?
1 percent
3 percent
10 percent
75 percent

Answer 1

1) Sewage treatment and nitrous oxide — wastewater treatment promotes microbial processes that produce N2O.
2) the open ocean — deepest, darkest zones are in the deep open ocean (abyssal/pelagic depths).
3) The population would increase. — more nest sites raise carrying capacity and allow more pigeons to breed/survive.
4) bacteria — decomposers that obtain energy from dead/decaying organic matter.
5) 1 percent — only about 3% of Earth’s water is fresh and roughly 1% is readily available (not locked in ice).