What is the importance of the carbon and nitrogen cycles to ecosystems?

a.
they supply the energy needed for living processes.

b.
they are needed to release the energy stored in food.

c.
they provide materials organisms need to build their bodies.

d.
they ensure that matter only moves within a nonliving environment.

Read the sentence. “yesterday we arrived late for the outdoor concert in the city gardens.” which words in the sentence are adverbs? a. late; city b. yesterday; outdoor c. yesterday; late d. outdoor; city

Astudent wants to test the hypothesis that fertilizer improves the growth rate of grass seeds. to test this hypothesis, the student put the same amount of grass seed in 3 containers with the same type of soil. the student measured the growth at the end of the week. all plants received equal amounts of water and sunlight. if you were asked to graph this data, what would you place on the x-axis? a. fertilizer b. water c. plant growth d. week one

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