Tag: botany

Questions Related to botany

The scientist to first employ magnifying glass for studying living beings is

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

  1. Robert Hooke.

  2. Huxley.

  3. Gesner.

  4. Tolles.

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Correct Option: C

The reflector of a classroom microscope is

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

  1. Convex lens.

  2. Concave lens.

  3. Concavo-convex lens.

  4. Plano-concave lens.

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Correct Option: D

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

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

  1. Abbe

  2. Tolles

  3. Gesner

  4. Galileo

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Correct Option: A
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.

Ocular lens is placed

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

  1. Near to the slide.

  2. On the path between reflector and object.

  3. Near to the eye.

  4. Near to the source of light.

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Correct Option: C

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

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

  1. Diaphragm.

  2. Stage of the microscope.

  3. Oil immersion lens.

  4. Inbuilt illumination.

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Correct Option: C

Dark field microscope was invented by

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

  1. Lister.

  2. Zernicke.

  3. Merten et. al.

  4. Carpersson.

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Correct Option: A
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.

Nose piece of a microscope is ____________.

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

  1. Eye piece.

  2. Capable of revolving.

  3. Site for objective.

  4. Both B and C.

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Correct Option: D

What is the magnification of common oil immersion lens?

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

  1. $45$x

  2. $100$x

  3. $450$x

  4. $1000$x

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Correct Option: B

Fluorescent screen or photographic plate is used for observation in

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

  1. Electron microscope.

  2. Fluorescent microscope.

  3. Ultraviolet microscope.

  4. All of the above.

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Correct Option: D

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

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

  1. Compound microscope

  2. Dark field microscope

  3. Phase contrast microscope

  4. Ultraviolet microscope

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Correct Option: D