A bilayer of phospholipids.
The difference between a multicellular organism and a colonial organism is that individual one-celled organisms from a colony can, if separated, survive on their own. so yes colonial organisms can live on their own.
The answer is Nutrients the plant needs
<span>Human skin color variations are primarily being determined by the type and amount of melanin pigment which is the skin.
The reason is the amount of melanin present, pigment present which determines the color of skin the more the melanin the more dark color they are.
Human skin color variation is likely evolved in response to differences in intensity of sunlight around the world. Reason being it has been developed because of different exposure of humans to the varied environment during migration. Human skin color variation evolved recently in hominid evolution.</span>
B plasma cells - Detect an antigen and respond by biding to that antigen and then making multiple copies of itself, they make B effector cells which fight the antigen/pathogen and then the B memory cells which help the cell to remember that specific antigen if it happens to encounter it again.
