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kumpel [21]
3 years ago
11

Why are carbon and nitrogen cycles important to ecosystems?

Biology
2 answers:
gogolik [260]3 years ago
5 0

C. They provide materials organisms need to build their bodies.
Anestetic [448]3 years ago
5 0
The answer is C i took the test.
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Under which circumstances should we try to control the population numbers of Pfiesteria?
zvonat [6]

Answer:

Pfiesteria species generally found in estuaries, the population of which are needed to be controlled only when they becomes toxic. Presence of large of fish triggers toxicity in Pfiesteria.

Explanation:

Pfiesteria are known to be associated with fish kills as for example large fish kill in the seas of North Carolina. It also causes blooming of algae in enormous numbers thus make the water bodies, hostile for survival of fishes and other marine lives. It affects human too by release of toxins in air and water often resulting in respiratory problems, infections of gastrointestinal system, headaches and fatigue. In this type of grave circumstances, leading to outburst of population of Pfiesteria, there is an urgent need to control.

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3 years ago
Which of the following is true about elements?
AleksAgata [21]

Answer:

I believe the answer is D or B.

Explanation:

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Which two pieces of data indicate that Uranus resides in the outer region of the solar system?
dimaraw [331]

It is D & E. Uranus is Helium & Hydrogen, And it has dark rings

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3 years ago
There is little variety among organisms found in pools, ponds, and lakes.
aniked [119]
That's true. There is little variety among organisms found in pools, pounds and lakes. Despite that fact that many ponds are seasonal, lasting just a couple of month (for exemple sessile pools) while lakes can exist for more than hundred years. Lakes and ponds have limited species diversity because they are often limited from each other and from other water sources like rivers, seas and oceans. 
3 0
3 years ago
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Explain how scientists use geologic time to determine the age of landforms.
Pavlova-9 [17]

Answer:

Explanation:Following are the techniques or methods or approaches we can say that were used by the scientists to determine the geologic age:

1. Relative age dating

2. Absolute age dating.

3. Radiation measurement.

4. Stratigraphic superposition.

5. The fossil record.

The scientists used the method of relative dating to divide Earth's past in different chunks of time when alike organisms were on Earth. After that, to discover the actual number of years ago that events occurred, the scientists used the method of absolute dating.

8 0
3 years ago
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