What are the advantages of having a double helix contain 2 dna strands

During sunny hours, a large amount of build up between the hours of 1: 00-5: 00 pm. a. ozone b. mercury c. lead d. sulfuric acid

If a cell's main function is to produce proteins to be excreted, which organelles would you expect to be larger

All but one describes an effect of aging on the digestive system. a) decreased acid secretion b) decreased elasticity of stomach c) capacity to resist damage decreases d) food remains in stomach for less time