The cell theory was a. developed by robert hooke. b. developed before microscopes were invented. c. developed only after electron microscopes became widely used. d. developed by many scientists over many years.

D. Developed by many scientists over many years

Explanation: this is the correct answer

2b2t

explanation:

2b2t

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.