The microscope uses slight differences in refractive indexes and an annular condenser to produce sharper images than simple bright-field microscopy.

Mike has a problem with his testosterone. he is unable to produce enough. which will most likely be affected by his inability to produce testosterone? check all that apply.

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.

What is used as a template during replication? a- mrna b- trna c- rrna d- dna