NURSING ANM AND GNM

Detailed explanation-1: -He was the first person to observe bacteria and protozoa. By observing the movement of bacteria or protozoa he named them animalcules. Therefore, the correct answer is option C.

Detailed explanation-2: -Leeuwenhoek is universally acknowledged as the father of microbiology. He discovered both protists and bacteria [1]. More than being the first to see this unimagined world of ‘animalcules’, he was the first even to think of looking-certainly, the first with the power to see.

Detailed explanation-3: -Animalcule (’little animal’, from Latin animal + the diminutive suffix-culum) is an old term for microscopic organisms that included bacteria, protozoans, and very small animals. The word was invented by 17th-century Dutch scientist Antonie van Leeuwenhoek to refer to the microorganisms he observed in rainwater.

Detailed explanation-4: -Antonie van Leeuwenhoek-a cloth merchant by trade-is credited for the discovery of single-celled microorganisms, which he called “wee animalcules” (little animals) (Dobell, 1932).