Which of the following structures is found in both plant and animal cells?

A. cell membrane
B. chloroplast
C. cell wall
D. large, water-filled vacuole

i am pretty sure the answer is c

answer; i believe its (ovulation);

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.