How does a pine tree reproduce?
a. it produces stems. b. it produces roots. c. it produces leaves. d. it produces eggs and sperm.

Explain why phospholipid molecules form a bilayer. (3 marks)

Glucose is broken down in different ways, both in the presence and in the absence of oxygen. using the table for reference, what major products are formed in each reaction set?

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.