Which of these results when hormone secretion is regulated by a negative feedback mechanism?

all hormones are regulated by other hormones.
hormones determine the metabolic rate of all cells.
hormone concentrations rise and fall depending on the time of day.
the concentration of a hormone remains within a narrow normal range.

What did the first language sound like

Protein synthesis actually begins in the nucleus when transcribes a single gene on the dna molecule is copied. the process of copying this gene is called this copy is known as and contains the protein building instructions. this copy is sent out into the cytoplasm to the part of the cell known as the the of the ribosome will join together to form a functional ribosome when they attach to the mrna. as the mrna moves through the ribosome, the message is read by transfer rna brings the correct back to the ribosome. the amino acids are placed in the correct order and are hitched together by

Aplant may open end close its stomata to prevent excess water loss and maintain