AP BIOLOGY

Detailed explanation-1: -Plastids are double membrane bound cell organelle characteristic of higher plants. They are not found in prokaryotes like bacteria and blue green alga. Fungi are heterotrophic eukaryotes. They lack plastids.

Detailed explanation-2: -As we discussed above plastids are present only in plants and some lower eukaryotic organisms. So, they are absent in animal cells and higher eukaryotic cells. Plastids may be divided into chloroplasts, chromoplast and leucoplasts on the basis of the type of pigments.

Detailed explanation-3: -False. Plastids: Plastids are found in plant cells, but not in animal cells. There are three types of plastids, which are the chloroplast, chromoplast and leucoplast.

Detailed explanation-4: -Plastids are plant-specific organelles that arose from the ancient endosymbiosis of a photosynthetic bacterium. They are essential for plant life and exist in a variety of forms, each plastid type specialized for the functions of the tissue in which it resides.

Detailed explanation-5: -Plastids typically reside in plant or algal cells-with one notable exception. There is one group of multicellular animals, sea slugs in the order Sacoglossa, members of which feed on siphonaceous algae.