Help With BIO PLEASE!!!!!!!!!!1?

Question

1. Which trophic level contains the organisms that are the source of all chemical energy used in an ecosystem?
A.herbivores
B.producers
C.decomposers
D.parasites

2.Which statement best describes how organisms use nitrogen?
A.Animals absorb nitrogen from the air they breathe and incorporate it into their tissues.
B.Plants absorb nitrogen from the air in photosynthesis and add it to the sugars they produce.
C.Certain bacteria living in the roots of plants convert nitrogen to a form plants can use, and animals obtain their nitrogen by eating those plants.
D.Certain bacteria convert nitrogen to a form animals can use, and animals obtain their nitrogen by inhaling this nitrogen.

Answer 1

1. B. In this case, producers would be plants that the herbivores eat.

2. C. Nitrogen in the soil is converted to a usable form for plants. Animals do not get nitrogen by breathing it.