Which one is part of the endocrine system?
a. sweat gland
b. tear gland
c. pituitary gland
d. all of the above

For the given question, the right option is option "D". The sweat gland, the tear gland and the pituitary gland are all part of the endocrine system. Some of the glands release their secretion in certain specific areas onlym while other glands release secretion for different types of purposes. The tear gland and the sweat gland are perfect examples of exocrine glands that release sweat through the skin and saliva in the mouth respectively. Endocrine glands are glands that are capable of releasing about 20 different types of hormones directly in the bloodstream.

Six amino acids have side chains that are polar but not charged. these are serine (ser), threonine (thr), cysteine (cys), asparagine (asn), glutamine (gln), and tyrosine (tyr). these amino acids are usually found at the surface of proteins, as discussed in the proteins 2 module.

Well, both latitude and intensity of light affect temperature because, the higher the light intensity, the higher the temperature and since latitude is the measure of how close you are to the equator, then the closer to the equator you are, the higher the temperature is.