Biology 9th Chap 3 : Topic 6 - Maryam Publications

Biology Chapter 3 : Topic 6

Division of Labour

1 / 14

The term “division of labour” in biology refers to:

A) Cells performing all functions independently

B) Different structures performing specific functions

C) Only nucleus controlling all activities

D) Organisms sharing food equally

2 / 14

Which statement best explains division of labour within a cell?

A) Cell membrane controls all organelles directly

B) All organelles perform the same function

C) Each organelle performs a specific function

D) Only mitochondria perform all activities

3 / 14

Which pair correctly shows organelle and its specialized function?

A) Nucleus – respiration

B) Cell wall – energy production

C) Ribosome – protein synthesis

D) Vacuole – DNA storage

4 / 14

Why is division of labour important in a cell?

A) It makes all organelles identical

B) It stops cell division

C) It increases efficiency of cellular processes

D) It reduces the number of organelles

5 / 14

In multicellular organisms, division of labour occurs at the level of:

A) Organelles

B) Only nucleus

C) Molecules

D) Cells, tissues, and organs

6 / 14

Which is the best example of division of labour at cellular level?

A) All cells dividing rapidly

B) Nerve cells transmitting impulses

C) All cells performing photosynthesis

D) All cells storing food

7 / 14

What is the main advantage of division of labour in multicellular organisms?

A) Inefficient functioning

B) Slower growth

C) Higher efficiency and survival

D) No need for organs

8 / 14

Which organelle shows division of labour inside a cell most clearly?

A) Cell wall only

B) All organelles performing same function

C) Ribosomes only

D) Different organelles with specific functions

9 / 14

In multicellular organisms, muscle cells are specialized for:

A) Waste removal

B) Contraction and movement

C) Photosynthesis

D) Protein storage

10 / 14

Liver cells in humans show division of labour by:

A) Conducting impulses

B) Carrying oxygen

C) Producing light

D) Detoxifying harmful substances

11 / 14

Which of the following best represents division of labour at organelle level?

A) Nucleus controls all cells in body

B) Mitochondria produce energy while ribosomes make proteins

C) All organelles store water

D) All organelles perform photosynthesis

12 / 14

Why do multicellular organisms require division of labour more than unicellular organisms?

A) They have more complex body structures

B) They cannot divide

C) They are smaller

D) They lack nucleus

13 / 14

Which statement is TRUE about division of labour in cells?

A) Each organelle has a specific role

B) All organelles do identical work

C) Only cytoplasm is active

D) Nucleus performs all functions

14 / 14

Which is an example of division of labour at tissue level?

A) Muscle tissue enabling movement

B) Ribosome making protein

C) DNA replication

D) Mitochondria producing ATP

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