Why does dna need to coppy before the cell divides

Aperson with age is more likely to catch diseases that healthy people usually don’t catch.what are these infections called?

The current thought on the structure of the cell membrane is: a. a static phosphate sandwich of lipids b. a fluid-mosaic of phospholipids and proteins c. a bilayer of proteins with static lipid molecules d. an impermeable bilayer of protein molecules e. a static and permeable phospholipid single layer

Match each description of an object’s motion with the position-time graph that represents it. not moving moving with constant speed speeding up slowing down