Question

review vocabularyichoose the letter of the best answer.1. the conversion of nitrogen gas ($n_2$) to ammonia is calleda. denitrificationb. nitrogen cyclec. nitrogen fixationd. nitrogen limitation2. which rely on other organisms for their energy and food supply?a. primary producersb. biomassc. autotrophsd. consumersmatch the vocabulary term to its definition.3. the total amount of living tissue a. biomass4. small pieces of dead or decaying plant or animal remains b. denitrification

Explanation:

1. Nitrogen fixation is the process that converts atmospheric nitrogen gas ($N_2$) into ammonia, making it usable by organisms. Denitrification is the reverse process, the nitrogen cycle is the overall movement of nitrogen, and nitrogen limitation refers to nitrogen being a scarce resource.
2. Consumers are heterotrophs that must obtain energy and nutrients by consuming other organisms. Primary producers/autotrophs make their own food, and biomass is total living tissue.
3. The definition "The total amount of living tissue" directly matches the term biomass.
4. Detritus is the term for small pieces of dead or decaying plant/animal remains (note: while not listed, this is the matching term for the given definition; the provided option b is unrelated to this definition).

Answer:

1. C. nitrogen fixation
2. D. consumers
3. a. biomass
4. (Note: The correct term for this definition is detritus, which is not listed in the provided options; the given option b. denitrification does not match this definition)