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Question-1
Which of the following is true?
(A)
P
r
is needed for seed germination
(B)
P
fr
is needed for seed germination
(C)
High temperature is needed for seed germination
(D)
High enzyme content is needed for seed germination
Question-2
Which of the following is a gaseous plant growth substance?
(A)
Ethylene
(B)
Auxin
(C)
IBA
(D)
ABA
Question-3
Which of the following is "stress hormone"?
(A)
Auxin
(B)
2, 4, D
(C)
ABA
(D)
Ethylene
Question-4
For flowering, long day plants need:
(A)
Lengthy day period
(B)
Lengthy dark period
(C)
Short day period
(D)
Neutral
Question-5
Gibberellins promote seed germination by:
(A)
Activating the enzymes for respiration
(B)
Activating the process of inhibition
(C)
Activating the production of amylase
(D)
Activating cell division
Question-6
Gardeners pinch out apical bud to keep:
(A)
Plants healthy
(B)
Plants grow taller
(C)
Plants small and bushy
(D)
Plants to produce meristem
Question-7
The first auxin to be discovered was:
(A)
Indole Acetic Acid (IAA)
(B)
Indole Butyric Acid (IBA)
(C)
Naphthalene Acetic Acid (NAA)
(D)
2, 4, D
Question-8
Two growth substances may act together to produce a larger effect. This is known as:
(A)
Antagonism
(B)
Synergism
(C)
Metabolism
(D)
Anabolism
Question-9
Which of the following is used for stem elongation?
(A)
Cytokinins
(B)
Gibberellins
(C)
ABA
(D)
Auxin
Question-10
A growth response to touch is known as:
(A)
Gravitropism
(B)
Thigmotropism
(C)
Chemotropism
(D)
Geotropism
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Cambridge Advanced Grade 11
IGCSE
Practice in Related Chapters
The Molecules of Life
Regulations and Control
DNA and Protein Synthesis
Enzymes
Genetics
Cell
Cell Division
Photosynthesis And Plant Nutrition
Animal Nutrition
Reproduction in Animals
Ecology
Heterotrophic Nutrition
Gas Exchange
Evolution
Transport in Mammals
Transport in Plants
Respiration
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