We have 13 different clotting factor proteins in our blood. Do you think hemophilia is controlled by one or multiple genes?

The vaccine in a flu shot contains weakened flu viruses. how does a flu shot work with the immune system? a. it destroys lymphocytes. b. it destroys macrophages. c. it activates macrophages. d. it activates lymphocytes.

Which of the organisms listed below performs nitrogen fixation? a. legumes b. plants c. bacteria d. fungi

How does food concentration affect yeast activity