Question

The diagram shows a test-tube containing clear jelly. A drop of blue ink is injected into the middle
of the jelly.
clear jelly
H
I
drop of blue ink
The blue colour of the ink spreads throughout the jelly
By which process does the blue ink spread through the jelly?
A
active transport
catalysis
diffusion
osmosis​

Answer 1

Answer:

a) active transport

this is my answer

Answer 2

The blue ink spreads through the jelly by diffusion.

• Diffusion is the process by which molecules move from a region of higher concentration to a region of lower concentration.
• In this diagram, when a drop of blue ink is added to the clear jelly, it occupies a particular position inside the jelly.
• From there, every other point in the jelly is at a lower concentration of blue ink than the initial position occupied by it. So it starts moving to other points in the jelly, i.e, it diffuses throughout the jelly.
• This diffusion continues till every point in the jelly is at a uniform concentration of the blue ink, hence turning the whole jelly blue.

Therefore, the blue ink spreads through the jelly through diffusion.