1. A __________ is an excised piece of leaf or stem tissue used in micropropagation.
(A) Microshoot
(B) Explant
(C) Medium
(D) Scion
2. An internal factor that influences growth in plants is.
(A) Nutrition
(B) Water
(C) Hormones
(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) Differentiation
(D) Elongation
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) Unicellular alga
(B) Protist
(C) Multicellular alga
(D) Fungi
8. Stage one in differentiation involves.
(A) Formation of embryo
(B) Recognition of apical meristems
(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
