Question

1. Which of these elements is needed in addition to carbon, hydrogen and oxygen to make proteins?
a nitrogen
b. phosphorus
c. potassium
d. calcium
2. Which of the following gets absorbed from the atmosphere during photosynthesis?
a. oxygen
b. water vapour
carbon dioxide d. nitrogen​

Answer 1

Answer:

1)option a:nitrogen is needed with carbon, hydrogen and oxygen to make protein. Proteins are composed of molecules called amino acids, and each amino acid contains four elements: hydrogen, oxygen, nitrogen and carbon.

2)option b:Plants convert carbon dioxide and water into sugar and oxygen through the process of photosynthesis. Plants absorb carbon dioxide from the atmosphere during photosynthesis.

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Answer 2

Answer:

1:nitrogen

2:water vapour

Explanation:

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