THE CELL
CELL THEORY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
He created the first compound microscope.
|
|
|
Discovered that all plants are made of cells.
|
|
|
Discovered the first living cells and called them animalcules.
|
|
|
Discovered that all animals are made of cells.
|
Detailed explanation-1: -Janssen was the son of a spectacle maker named Hans Janssen, in Middleburg, Holland, and while Zacharias is credited with inventing the compound microscope, most historians surmise that his father must have played a vital role, since Zacharias was still in his teens in the 1590s.
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.
Detailed explanation-3: -In Boreel’s investigation Johannes also claimed his father, Zacharias Janssen, invented the compound microscope in 1590.
Detailed explanation-4: -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-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.