adapted from images courtesy of nih and wikipedia.

looking at the figures provided, assume that the figures are drawn to the same scale. which of the following is the largest structure in the animal cell?
a.
vacuole
b.
mitochondrion
c.
cell wall
d.
nucleus

Nucleus

Explanation:

It is enclosed by a nuclear membrane perforated by numerous pores. It regulates the activities of the rest of the cell. It contains chromosomes which carry the hereditary materials. One or more densely staining bodies called nucleoli is present in the nucleus. It is site for synthesis of ribosomes

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.

ecological efficiency: % of usable energy transferred as

biomass from one trophic level to the next typical is 10% efficient (90% of

energy is lost),is diagramed as the pyramid of energy flow. then osprey eagle

are tertiary consumer and the shrimp are primary consumer, so to balance

mass of shrimp (1/0.1) / 0.1 = 100 kg