Question

in onion epidermal cells, chloroplasts are __________ because plant epidermal cells do not conduct __________. absent; cellular respiration present; photosynthesis present; cellular respiration absent; photosynthesis

Explanation:

Chloroplasts are the sites of photosynthesis. Plant epidermal cells like onion epidermal cells do not perform photosynthesis and thus lack chloroplasts. Cellular respiration occurs in mitochondria and is not related to the presence or absence of chloroplasts here.

Answer:

D. absent; photosynthesis