Tag: botany

Quizzes (264) Questions (5276)

Questions Related to botany

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

Single lens microscope was built by

  1. Robert Hook

  2. Robert Koch

  3. Leeuwenhoek

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

Antonie van Leeuwenhoek used single-lens microscopes, which he made, to make the first observations of bacteria and protozoa. His extensive research on the growth of small animals such as fleas, mussels, and eels helped disprove the theory of spontaneous generation of life.

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

The term cytology was coined by

  1. Hertwig.

  2. Robert Hooke.

  3. Dutrochet.

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

Oscar Hertwig is a German zoologist and a professor who coined the term cytology. The cytology means the branch of biology which deals with the study of structure and functioning of plant and animal cell.

So, the correct answer is 'Hertwig'.

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

An optical instrument used to observe small organism is called as_____________.

  1. Microscope

  2. Telescope

  3. Magnifying lens

  4. Both A and B
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A- Microscope is a device which is used to view objects that are very small for the naked eye. Light microscopes also known as optical microscopes are the most common type of microscopes. Optical microscopes utilize light and lenses to magnify images. 

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

The cell arises from pre-existing cell was stated by

  1. Haeckel

  2. Virchow

  3. Hooke

  4. Schleiden
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Cell theory was postulated by Theodor Schwann and Matthias Schleiden in 1838. It includes the following points-
  • All living organisms are composed of one or more cells.
  • The cell is the most basic unit of life. The third was added by Rudolf Virchow in 1855, which stated: "Omnis cellula e cellula" which means all cells arise only from pre-existing cells.
Multiple choice botany cell and cellular organization cell theory microscope cell and its discovery

The term microscope was coined by

  1. Janssens

  2. Faber

  3. Hooke

  4. Leeuwenhoek
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
The term microscope was coined by Faber. It was mainly used for the compound microscope. It was termed as little eye by Galileo. It has magnifying lens which helps to accentuate the size of the microscopic objects. It has two sets of lens objective and eye piece which helps in magnification. The number of times it magnifies is known as magnification power.
So, the correct answer is option B.
Multiple choice botany cell and cellular organization cell theory microscope cell and its discovery

The scientist who saw the living cell for the first time was

  1. Leeuwenhoek

  2. M. J. Schleiden

  3. Kolliker

  4. Pallade
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • Antonie van Leeuwenhoek was the first to notice living cells under his microscope which he called animalcules through his preliminary microscope.
  • M.J. Schleiden co-founded cell theory.
  • Kolliker has made major contributions to viewing zoological and histological samples.
  • Pallade was awarded the noble for discovering the ribosomes and rough endoplasmic reticulum. Thus, the correct answer is option A.
Multiple choice botany cell and cellular organization cell theory microscope cell and its discovery

The name 'cell' was coined by 

  1. Leeuwenhoek

  2. Robert Brown

  3. Robert Hook

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

Robert Hook, an English scientist, discovered a honey-comb like structure in a cork slice using a primitive compound microscope. Since a piece of cork slice is dead tissue so he could only see hollow compartment as the protoplasm was not present in these dead compartments. These compartments were called as 'cell' by him.

So, the correct answer is 'Robert hook'.

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

Observe the table and answer a, b.


S. No. Scientist Invention
1 Robert Hooke a
2 b Nucleus
3 Schleiden, Schwann  Cell theory

  1. a- Cell b- Robert Brown

  2. a- Cell wall b- Robert Brown

  3. a- Cell wall b- Schleiden

  4. a- Cell membrane b- Robert Brown
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • Robert Hooke had discovered plant cells more precisely, he saw the cell walls in cork tissue. In fact, it was Hooke who coined the term "cell" and also discovered cell wall.
  • Robert Brown had discovered the plant cell nucleus.
Multiple choice botany cell and cellular organization cell theory microscope cell and its discovery

In 1665, Robert Hooke first observed cells in 

  1. Leaf

  2. Cork

  3. Intestin

  4. Liver
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The first cell was observed and named by Robert Hooke in 1665. He described that it looked like cellula, small rooms which are inhabited by monks hence derived the name 'cell'. The cell he actually saw was the dead cell walls of the plant (cork) under a microscope. Hooke described the characteristics of a cell he observed in his book 'Micrographia'. 

So, the correct answer is 'Cork'