Adaptive immunity can be acquired during either 'naturally' (by infection) or 'artificially' (through deliberate actions such as vaccination). Adaptive immunity can also be classified as 'active' or 'passive'
True, that's why its known as a ''complex trait'', which mean that is usually caused by a mutation in gene.
The main symptom of anorexia is extreme weight loss
Adenine forms adenosine when connected ribose.