DNA strand and its complementary strand are held together by hydrogen bonds. One strand will be bonded to a T (thymine) on the opposite strand by 2 hydrogen bonds.
Answer:
I believe it is B. The damaged tissue releases chemical messengers
Explanation:
This is because the chemicals of the so-called complement system start drilling holes into bacterial cell walls. Macrophages, big eater cells, devour any invaders they meet. This is to prevent furthur infection!
All the cells in an organism should have the same no. of chromosomes i.e. in this case 23 pairs , as each cell carries the same DNA .
Answer:
Alloy is a mixture made up of iron &nickel.