AP BIOLOGY

Detailed explanation-1: -In 1665, Robert Hooke published Micrographia, a book filled with drawings and descriptions of the organisms he viewed under the recently invented microscope. The invention of the microscope led to the discovery of the cell by Hooke.

Detailed explanation-2: -But that year, Robert Hooke published his groundbreaking Micrographia-a book that revealed this previously unseen and unknown world. Hooke was one of a small handful of scientists to embrace the first microscopes, improve them, and use them to discover nature’s hidden details.

Detailed explanation-3: -Explanation of correct answer: Anton von Leeuwenhoek was the first one who discovered free-living cells of algae in water in 1674. Anton von Leeuwenhoek invented the compound microscope and was the first to see free-living cells. He observed bacteria, red blood cells, sperms, etc.