Which enzyme is used specifically for rna transcription from dna in the nucleus of a cell?

Which characteristics are typical of a human population in the postindustrial stage?

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

How do specific cell structures and organelles contribute to maintaining homeostasis in the cell?