How can you tell when asthma is related to exercise?

What must be done to breed dogs for a partical trait

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.

Climate warming trends allow plant and insect species to inhabit larger ranges. select the best answer from the choices provided