A Viceroy caterpillar feeds on a leaf. If a day's feeding gains the caterpillar a total of 1000 calories and 50% is lost in its feces and 33% of the energy is used through cellular respiration, how many calories of the original intake are available for caterpillar biomass

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.

well for one plants are always the producer, so a is the answer. a wolf is more of the consumer(predator) and the deer is the prey so i know those two are out of the question. also mushrooms are fungi/fungus so a is the producer.

cells spend most of their time in interphase