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Question-1
Dormin refers to:
(A)
Auxin
(B)
NAA
(C)
IAA
(D)
ABA
Question-2
Which growth substance is responsible for apical dominance?
(A)
Gibberellins
(B)
Cytokinins
(C)
ABA
(D)
Auxin
Question-3
Name the enzyme that catalyse the conversion of starch to maltose.
(A)
Amylase
(B)
Cymase
(C)
Isomerase
(D)
Ketase
Question-4
Name the growth substance used as weedkiller (weedicide).
(A)
Auxin
(B)
ABA
(C)
IBA
(D)
2, 4 , D
Question-5
Which hormone promotes fruit ripening?
(A)
Auxin
(B)
Ethylene
(C)
Gibberellins
(D)
Cytokinin
Question-6
Name the gaseous phytohormone transported through air.
(A)
Auxin
(B)
Ethene
(C)
NAA
(D)
Ethylene
Question-7
Which of the following is a gaseous plant growth substance?
(A)
Ethylene
(B)
Auxin
(C)
IBA
(D)
ABA
Question-8
Chrysanthemum is an example of:
(A)
Long day plant
(B)
Short day plant
(C)
Day neutral plant
(D)
Vernalised plant
Question-9
Which plant growth substance promote stomatal closure?
(A)
ABA
(B)
Auxin
(C)
Gibberellins
(D)
Ethylene
Question-10
Choose the correct statement from the following.
(A)
In dark there is more P
fr
than P
r
(B)
In dark, there is more P
r
than P
fr
(C)
In dark no P
r
or P
fr
(D)
In light, there is more P
r
than P
fr
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Cambridge Advanced Grade 12
IGCSE
Practice in Related Chapters
Transport in Plants
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Reproduction in Animals
Gas Exchange
Evolution
Transport in Mammals
Respiration
Heterotrophic Nutrition
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