What is cell Theory, What makes plants appear green, what is a vacuole, what are unicellular organisms........ask why

 Q) What Makes plants appear green?

Ans- Plants appear green due to the presence of a pigment called chlorophyll. There are high concentrations of chlorohyll in chloroplasts. These plastids are responsible for photosynthesis.


Q) What is a vacuole? 

Ans- The vacuole is the cell organelle that stores excess. water and gives support and rigidity to a plant cell. It occupies about 80% of the plant cell volume.

Q) What is cell theory ?

Ans- The main postulates of cell theory are:

• All living organisms are composed of one or more cells.

 • Cell is the basic unit of structure, function, and organisation in all organisms.

• All cells come from pre-existing, living cells.


• All living cells do not have cell walls. It is present only in plants, fungi and bacteria.


Q) What are unicellular organisms?

Ans-Unicellular organisms are made up of just a single cell. All basic functions that are required to sustain life such as growth, repair and division are all carried out by that single cell. Euglena is a single-celled organism. Liver flukes, ticks and sponges are multicellular organisms.


Did you know ! Both RNA (Ribo nucleic acid) and ribosomes could be found in both nucleus and cytoplasm


A fact- Cell staining is the technique of colouring different cellular organelles. It is used to visualise cells and cellular components better under a microscope. By using different stains, one can preferentially stain specific cell components, such as a nucleus, cell wall, or the entire cell.


Read our whole chapter notes here

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