Which organisms are secondary consumers in this food web? Select all that apply

Rattle snake, kit fox, coyote, raven

Explanation:

Secondary consumers form the third trophic level in a food chain or food web. They eat primary consumers which in turn eat the producers. An organism can have a different consumer level according to its position in the given good chain.

In the given food web; rattle snake, kit fox, coyote and raven eat many things simultaneously. However all of them also eat desert woodrat. Desert woodrat is a primary consumer since it consumes producer plants like creosote bush and beavertail cactus. Rattle snake, kit fox, coyote and raven are secondary consumers since they eat the primary consumer (desert woodrat). Desert iguana is not a secondary consumer. It directly feeds on creosote bush so it is a primary consumer.

this protocol provides a detailed procedure for nucleoprotein extraction from cultured cells and tissues in an efficient manner.

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.