Why are Cells Usually Small?

Author:Chhattisgarh Board
9th Chhattisgarh Board
IMPORTANT

Important Questions on Why are Cells Usually Small?

MEDIUM
IMPORTANT
Science (Theory & Practical) Class-9>Fundamental Unit of Life : Cell>Why are Cells Usually Small?> Q 1

Cells are so small that you need a microscope to examine them. Why?

HARD
IMPORTANT
Science (Theory & Practical) Class-9>Fundamental Unit of Life : Cell>Why are Cells Usually Small?> Q 2

Radius(mm) 0.5 1.0 1.5 3.0 3.5
Surface area  3.4 12.6 28.6 113.4 153.6
Volume (V) 0.6 4.7 14.4 112.5 179.5
Ratio of SA to V 6:1 3:1 2:1 1:1 0.8:1

How does the radius affect the ratio of surface area and volume of the cell?

HARD
IMPORTANT
Science (Theory & Practical) Class-9>Fundamental Unit of Life : Cell>Why are Cells Usually Small?> Q 3

Radius(mm) 0.5 1.0 1.5 3.0 3.5
Surface area(SA) 3.4 12.6 28.6 113.4 153.6
Volume(V) 0.6 4.7 14.4 112.5 179.5
Ratio of SA to V 6:1 3:1 2:1 1:1 0.8:1

As the radius of the cell increases what difference do you observe in surface area and volume of the cell.

HARD
IMPORTANT
Science (Theory & Practical) Class-9>Fundamental Unit of Life : Cell>Why are Cells Usually Small?> Q 4

What are the advantages for a cell to have a small size.

MEDIUM
IMPORTANT
Science (Theory & Practical) Class-9>Fundamental Unit of Life : Cell>Why are Cells Usually Small?> Q 5

What would happen if cells were big?