Question

1a. humans take in nitrogen by ______. choose an option a breathing b sleeping c eating d exercising 1b. select a clip from the video that supports your answer. learn how. view/edit video clip (0:00 - 3:54) 1c. how does nitrogen enter our food? write your answer here...

Explanation:

1A

Humans can't directly absorb nitrogen from the air (breathing takes in oxygen, nitrogen in air isn't used directly). Sleeping and exercising don't involve nitrogen intake. Nitrogen is part of proteins, nucleic acids etc., and we get it by eating food (like plants/animals that have nitrogen - containing compounds). So the correct option is C.

Nitrogen enters our food through the nitrogen cycle. First, nitrogen - fixing bacteria (or lightning) convert atmospheric nitrogen into ammonia (or other usable forms). Then, plants take up this usable nitrogen (like nitrates) from the soil and incorporate it into their organic compounds (like proteins) when they grow. When we eat plants (or animals that ate plants), we consume the nitrogen - containing compounds from these organisms, thus getting nitrogen into our food.

Answer:

C. eating

1B

(Note: Since the video content isn't provided, the general approach is to find the clip that explains how humans obtain nitrogen through food, maybe explaining the nitrogen cycle related to food sources like plants taking up nitrogen from soil and then being consumed by humans, or the role of nitrogen in nutrients we eat.)

1C