Question

1.
The diagram below represents a layer of epidermal
cells showing a fully grown root hair study the
diagram and answer the questions that follow:
(a) Name the parts labelled A, B, C and D.
(b) The root hair cell is in a turgid state. Name and explain
the process that caused this state.
(c) Mention one distinct difference between the parts
labelled A and B.
(d) Draw a diagram of the above root hair cell as it would
appear when a concentrated solution of fertilizers is
added near it
​

Answer 1

a) Part A - Cell Wall

Part B - Cell Membrane

Part C - Vacuole

Part D - Nucleus

b) The process that caused this state is Endosmosis.

Endosmosis is defined as the inward diffusion of water molecules, into the cell, when the sugar concentration inside the cell is greater than the sugar concentration outside the cell.

c) Part A is freely permeable, while Part B is semi permeable.

d) Look at image pasted

Answer 2

Answer:a:- A -Cell wall

B- Cell membrane

C- Vacuole

D- Nucleus

b:- the process is endosmosis

The cell becomes tirgid because the cytoplasm of the cell is conc. and it takes in water from surrounding to become dil. and minimise osmotic pressure.

c:- Cell wall - freely permeable.

Cell membrane - selectively permeable.

d :- The cell will be plasmolysed in diagram.