AP BIOLOGY

THE CELL

CELL THEORY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What was the contribution of Zacharias Jansen?
A
He created the first compound microscope.
B
He created the first simple microscope.
C
He came up with “cell theory.”
D
Invented the cheese burger
Explanation: 

Detailed explanation-1: -A Dutch father-son team named Hans and Zacharias Janssen invented the first so-called compound microscope in the late 16th century when they discovered that, if they put a lens at the top and bottom of a tube and looked through it, objects on the other end became magnified.

Detailed explanation-2: -It’s not clear who invented the first microscope, but the Dutch spectacle maker Zacharias Janssen (b. 1585) is credited with making one of the earliest compound microscopes (ones that used two lenses) around 1600. The earliest microscopes could magnify an object up to 20 or 30 times its normal size.

Detailed explanation-3: -Zacharias Janssen contributed to cell theory with the invention of the single-lens microscope and that of multiple lenses (compound microscope) for cell discovery in the future. He was able to develop this invention due to his knowledge of the family lineage of lens manufacturers.

Detailed explanation-4: -In Boreel’s investigation Johannes also claimed his father, Zacharias Janssen, invented the compound microscope in 1590.

Detailed explanation-5: -Zacharias Janssen (born between 1580 and 1588, died in 1638) was a famous Dutch inventor and spectacle-maker that is today best known for his associations in the creation of early models of telescope and compound microscope.

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