Tag: botany

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Questions Related to botany

Multiple choice botany cell and cellular organization cell theory microscope cell and its discovery

Present-day condenser of the optical microscope was developed by_________.

  1. Abbe

  2. Tolles

  3. Gesner

  4. Galileo
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Option $ - (A) $ Abbe 
The Abbe condenser is named for its investor Emst Abbe, who developed it in 1870. The Abbe condenser, Which was originally designed for Zeiss is mounted below the stage of the microscope.
Multiple choice botany cell and cellular organization cell theory microscope cell and its discovery

Robert B. Tolles is famous in microscopy for the invention of

  1. Diaphragm.

  2. Stage of the microscope.

  3. Oil immersion lens.

  4. Inbuilt illumination.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Robert B. Tolles was an American optician who made significant improvements to microscope lenses, specifically the development of the oil immersion lens to increase resolution.

Multiple choice botany cell and cellular organization cell theory microscope cell and its discovery

Dark field microscope was invented by

  1. Lister.

  2. Zernicke.

  3. Merten et. al.

  4. Carpersson.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In 1830, J.J. Lister (the father of Joseph Lister) invented the darkfield microscope, in which the standard brightfield (Abbe) condenser is replaced with a single or double-reflecting dark field condenser.

Multiple choice botany cell and cellular organization cell theory microscope cell and its discovery

Fluorescent screen or photographic plate is used for observation in

  1. Electron microscope.

  2. Fluorescent microscope.

  3. Ultraviolet microscope.

  4. All of the above.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In electron, fluorescent, and ultraviolet microscopes, the light or radiation used is often invisible to the human eye, requiring a fluorescent screen or photographic plate for detection.

Multiple choice botany cell and cellular organization cell theory microscope cell and its discovery

In which of the following microscopes direct observation is not possible?

  1. Compound microscope

  2. Dark field microscope

  3. Phase contrast microscope

  4. Ultraviolet microscope
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Ultraviolet light is invisible to the human eye, so direct observation through an eyepiece is not possible; the image must be captured on a photographic plate or digital sensor.