Can u translate it to english?!
The two methods used by breeders to increase the rate of mutation is radiation and chemicals.
Salt water is a hypertonic solution in comparison to the internal cellular liquid, since there are more solute particles outside in the salt water than inside in the cytoplasm. This means that water will move out of the cells by osmosis due to the concentration gradient, and the cells will become shrivelled. Water will diffuse from a higher water concentration outside the cell to a lower water concentration inside the cell.
Answer:
4 significant digits
Explanation:
non-zero digits are always significant, and zeros in between significant digits are also significant.
The sympathetic nervous system. The hypothalamus, in close association with the limbic system of the brain. <span>The two main chemicals invoved here are the neurotransmitter "norepinephrine" (noradrenaline) and the hormone "epinephrine" (adrenaline).
So I would say D</span>