Question

Question 91 pts
(01.02 MC)

How can nitrogen from the air enter the soil?

Group of answer choices

Lightning and rainfall

Sunlight

Photosynthesis

Respiration

Flag question: Question 10
Question 102 pts
(01.02 MC)

Trey wrote a few steps to describe how carbon circulates between the atmosphere and living organisms:

Step 1. Carbon enters the atmosphere when fossil fuels are burned.
Step 2. Plants absorb carbon in the air through photosynthesis.
Step 3. Plant-eating animals consume the carbon stored in plants.

If step 2 is removed, which statement best describes the effects of this missing step on the carbon cycle?

Group of answer choices

More carbon is stored in the atmosphere.

There is a decrease in the amount of carbon stored in the air.

Animals consume foods with extra stored carbon.

More carbon is stored in plants instead of the air.

Answer 1

Question 9: Lightning and rainfall.
- Lightning fixes atmospheric N into nitrates that rain carries into the soil.

Question 10: More carbon is stored in the atmosphere.
- Without photosynthesis, plants won't remove CO2 from the air, so atmospheric carbon increases.