Could someone me me with this question , you!

What is the answer for the complicated molecules that make up living things usually contain carbon. why is carbon so important in these molecules?

9. the history of life on earth is recorded in

Viruses can be transmitted through air, water, food, insect bites, and direct skin contact. once a virus gains entry into the body, it invades a host cell in order to? a. synthesize antibodies for defense b. deactivate the host cell's defenses c. access cell processes for reproduction d. metabolize host proteins and grow