Why is it important to form a hypothesis before experiments are conducted?

Development of new communities in disturbed environments, such as a burned or a clear cut forest, is called

The production of cells during mitosis into specialized function is recombination or differentiation

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.