MCQs Of Biology – Plants Growth

By: Prof. Dr. Fazal Rehman | Last updated: May 14, 2025

1. : A __________ is an excised piece of leaf or stem tissue used in micropropagation.
(A) Microshoot
(B) Medium
(C) Explant
(D) Scion

2. : An internal factor that influences growth in plants is.
(A) Hormones
(B) Water
(C) Nutrition
(D) All of the above

3. : Signs of aging include.
(A) Loss of hair pigment
(B) Dryness and wrinkling of skin
(C) Forgetfulness
(D) All of the Above

4. : Rate of growth stops and plants die at a temperature of.
(A) 20-30°C
(B) 10-20°C
(C) 35-40°C
(D) 5-10°C

5. : Synthesis of cytoplasm and cell wall material takes place during.
(A) Maturation
(B) Cell division
(C) Elongation
(D) Differentiation

6. : The secondary tissue is added by the.
(A) Intercalary meristem
(B) Vascular cambium
(C) Apical meristems
(D) Both A and B

7. : Acetabularia is a kind of.
(A) Fungi
(B) Protist
(C) Multicellular alga
(D) Unicellular alga

8. : Stage one in differentiation involves.
(A) Recognition of apical meristems
(B) Formation of embryo
(C) Recognition of cambium
(D) Production of leaf primordial

9. : Phenomena that some cells evoke a specific developmental response in other cells is.
(A) Embryonic influence
(B) Embryonic induction
(C) Embryonic stimulation
(D) Embryonic dominance

10. : Effect of auxin diffusing from an apical bud on lateral shoots is known as.
(A) Promoting effect
(B) Compensatory effect
(C) Inhibitory effect
(D) Supporting effect