LIFE SCIENCE

Detailed explanation-1: -Because animals get sugar from the food they eat, they do not need chloroplasts: just mitochondria.

Detailed explanation-2: -It is a common perception that animal cells do not have chloroplasts, the organelles that performs photosynthesis. Yet, a small number of sea slugs are able to incorporate carbon from CO2 by performing photosynthesis using sequestered chloroplasts from the macroalgae in their diet.

Detailed explanation-3: -Unlike the eukaryotic cells of plants and fungi, animal cells do not have a cell wall. This feature was lost in the distant past by the single-celled organisms that gave rise to the kingdom Animalia.