Question

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Answer 1

Ques. 17

a) Chloroplast

b) Lysosome

c) Mitochondria

d) Ribosome

e) Endoplasmic reticulum

f) Nucleus

g) Vacuoles

Ques. 18

Plasma Membrane:

1.Protects protoplasm.

2.It separates the components present inside to outside environment.

3.Helps in cell-cell communication.

4.It allows the passage of molecules

Cell wall:

1.Cell wall provides rigidity to the cell, protect the cell from external shock and other mechanical forces.

2.It is responsible for cell morphology.

3.It prevents large molecule to enter into the cell.

4.Also, prevent the cell from being toxic.

5.Helps in maintaining the osmotic environment of the cell.

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Answer 2

Answer:

1. plastid
2. lysosome
3. mitochondria
4. ribosomes
5. endoplasmic reticulum (ER)
6. nucleus
7. vacule

Difference:-

1. Cell membrane is present is all cells while cell wall is only present in plants, bacteria, fungi and algae. ..

. 2. Cell wall is made up of cellulose whereas cell membrane is made up of lipids and proteins.

3. Cell wall is non-living whereas cell membrane is living.

hope this helps you