D. an arctic fox is brown in summer and white in winter
The ribosomes
they attach to rough endoplasmic reticulum
The genus and the Species
-They are multicellular organisms which do not possess chlorophyll.
-They are eukaryotic organisms.
-Cell wall is absent.
-Mode of nutrition is heterotrophic i.e. they depend on other organisms for food.
The endoplasmic reticulum is an organelle that is responsible for the synthesis of lipids and the modification of proteins.