PLEASE ANWER THIS FOR ME; RIGHT KNOW Make a claim about how a mutation in the DNA could affect the proteins made by the cell. Summarize evidence to support the claim and explain your reasoning.

The answer for #3 is c but i don't know why

Read these sentences from the text. near the equator, the tropics receive the most rain on a consistent basis. as a result, the fresh water falling into the ocean decrease the salinity of the surface water in that region. [. .] . . as the salt content of sea water increases, so does its density. what can you infer about how rain affects the density of surface water near the equator?

Long term exposure to waves can cause sunburns and skin cancer. a) visible b) infrared c) gamma rays d) ultraviole