Multiple choice

What did Anton van Leeuwenhoek invent?

  1. Portable care units

  2. Stethoscope

  3. The microscope

  4. Bifocals

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Anton van Leeuwenhoek designed and built high-magnification single-lens microscopes, which allowed him to become the first person to observe and describe single-celled organisms, which he called "animalcules."