What are the alternate energy sources that are starting to replace the use of coal in the U. S.?

Aheterozygous normal male marries a woman with a sickle cell anemia. give the genotypes and possible phenotypes of the offspring

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.

How would you describe the the organisms in the second row of model 1 that are connected to the parents by a line