In women's menstrual lining, the tissues will keep on activating hormones until the right thickness of the lining of the menstrual is achieved, which would fall on the positive feedback. Then, when the estrogen hormones are being passed on the blood, it travels to the pituitary gland to tell the follicle stimulating hormone to stop producing.
The best answer is that Genes code for proteins!
Chromosomes is where the genes are located (humans have a lot less chromosomes than genes)
Enzymes are chemical substances that participate in the creation of proteins.
RNA is another molecule which is important for making of proteins, but it is more fitting to say that the Genes are the ones coding for proteins. (RNA participates in the coding and decoding of genes)
The shape of a mineral's crystal indicates how long the crystal has been created, how long did it take to create such and it represents its classification as well. It also indicates how much the minerals reflect light.
The classification and naming of organisms is an ordered system that is intended to indicate natural and evolutionary relationships.