So that both sets of cells will have sets of chromosomes after it copies and divides
Protons and neutrons are found in the nucleus. They group together in the center of the atom.
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Prions is a disease and are a family of rare progressive neurodegenerative disorders that affect both humans and animals.
Cnidaria - incomplete digestion [have only a single opening] ,digestion is extracellular and intracellular ,they have stinging casules called cnidoblast which helps for anchorage,defence and capture prey.
echinodermata - complete digestion[mouth on ventral,anus on dorsal],have water vascular system helps in locomotion ,capture of prey,transport of food....digestion is intracellular
