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sineoko [7]
3 years ago
15

Which of the following statements is true? Natural energy sources are nonrenewable and being depleted. Current fuels are not pol

luting the air. Mercury released into aquatic ecosystems comes from rock erosion. The natural cycles of Earth can clear up our current air and water pollution problems.
Biology
2 answers:
Dennis_Churaev [7]3 years ago
6 0
The first sentence is correct....
VikaD [51]3 years ago
6 0

Answer: Natural energy sources are non renewable and being depleted.

Explanation:

The natural energy sources like coal, petroleum, and natural gas are non renewable sources of energy which means they cannot be replenished after once used. As their demand is increasing their concentration in the environment decreasing.

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Which substance on the plasma membrane helps identify chemical signals from outside the cell?
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Answer:

<em><u>The correct option is A) carbohydrate chain</u></em>

Explanation:

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Other options, like option B, is not correct because the function of the cholesterol in the cell membrane is to prevent the fatty acids from sticking together. Option D is not correct because transport proteins help some molecules to move inside the cell.

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3 years ago
Which part of photosynthesis is represented by the diagram to the right
Yanka [14]

Answer:

<em>Light-dependent reactions</em>

<em></em>

Explanation:

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The diagram shows reactions occurred in the thylakoid membranes which are located inside the chloroplasts. Therefore, we can identify that these reactions are the light-dependent reactions. During this part of photosynthesis, the energy from the sunlight is absorbed by a pigment called chlorophyl (Chl). Then, it is sequentially coverted into chemical energy stored in the form of molecules: NADPH (nitotinamide adenine dinucleotide phosphate) and ATP (adenosine triphosphate).

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hope this helps! ❤ from peachimin

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