1. Should genetic engineering be used to purposefully change human genes and give people more desirable traits? Is this an ethical issue? Explain your response.

answer; i believe its echoic memory,it is believed to last three to four seconds; good luck

the answer is b.) hydrogen bonds between bases.

the atmospheric gas that forms a mild acid when dissolved in water is called carbon dioxide. the correct answer is a. 2.) chemical weathering would cause an inscription on a marble headstone to become harder and harder to read over time.