Moth larvae eats leaves of the plant. It is an herbivore, a primary consumer in food chain. The primary consumer occupies the second trophic level in owl's ecosystem. The moth larvae in turn is eaten by small bird, a secondary consumer. Thus small bird occupies the third trophic level. Small bird is eaten by an owl, a top consumer that occupies fourth trophic level.
Answer:
Nucleus because it contains the dna and controls the activities of the cell.
Law of conservation of mass states that overall mass can neither be created nor destroyed. It means, that mass in left hand side & right hand side of the reaction would always remains constant
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