1 Which of the following statements about cellular respiration is true?
A Animals do not carry out cellular respiration.
B Cellular respiration is the process by which some living things take energy from the sun to make food.
C Oxygen is a product of cellular respiration.
D Oxygen is a reactant of cellular respiration.

step 1 ammonium can be absorbed by plants, but some is converted into nitrates which are better for plants to absorb. this is called nitrification. 2. step 2 the deer eats the plants and uses the nitrogen-containing proteins for cell growth. 3. step 3 bacteria in the soil conduct nitrogen fixation to convert nitrogen gas from the atmosphere into ammonium. 4. step 4 some of the nitrates are absorbed back into plants, but denitrification breaks down the nitrates into nitrogen gas released back into the atmosphere. 5. step 5 nitrogen is found in the urine, which gets broken down into ammonium through the process of ammonification. 6. step 6 plants absorb the ammonium and begin assimilation, the process to add the nitrogen to protein.

because they are eaten by the frog and the frog getseaten by the snake and the snake by the eagle

looks like the answer is     c     to me!

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