What type of molecules are antigens?

Galaxy whose shape seems different follow no set pattern are classified as

Why is the statement not a hypothesis? sunflowers require soil and plenty of sunlight and water to grow and thrive.

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