was the first to describe microorganisms, while was the first person to see bacteria.

Antoni Van Leeuwenhoek/Robert hook

Explanation:

Antoni Van Leeuwenhoek (1673) was the first to describe the microbes using a microscope of his own.Antoni Van Leeuwenhoek used a simple microscope to describe the microbes with accurate drawing and description.He called these microbes as animalcules.Hook was the first scientist to describe the living things under the microscope.He wrote a book Microphagia in 1665 with the description of plant cell.

Cotton was the very first

A) early horses is your answer