A slide of human blood cells was observed in focus under the low-power objective of a compound light microscope was switched to high power the image was dark and fuzzy. Which parts of the microscope should be used to correct this situation

The images show the wings of a bat and a bee. from this evidence, what can you conclude about the evolutionary relationship between these organisms? a. the wing structures of the bat and the bee are different, indicating they didn’t inherit wings from a common ancestor. b. the wing structures of the bat and the bee are different, indicating they inherited wings from a common ancestor. c. the functions of bat wings and bee wings are the same, indicating they obtained wings from a common ancestor. d. the functions of bat wings and bee wings are different, indicating they didn’t obtain wings from a common ancestor.

The influenza virus cause the flu, but not other diseases. why?

This is an active transport mechanism by which cells pump sodium and potassium ions against the concentration gradient