Chromosomes are thread-like structures in which DNA is tightly packaged within the nucleus.
Answer:
erosion and a, weatheri g and b
The oxygen is inhaled to the blood vessel which brings the oxygen to a cell.
The anterior pituitary receives signalling molecules from the hypothalamus, and in response, synthesizes and secretes seven hormones. The posterior pituitary does not produce any hormones of its own; instead, it stores and secretes two hormones made in the hypothalamus.