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Free download in PDF Plant Growth and Development Multiple Choice Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
(1)
Etiolation is characterized by
[A]
Slender yellowish stems
[B]
Small yellowish leave
[C]
Subterminal hook
[D]
All the above
(2)
The discovery that light induced bending of stem The Apex produces a diffusible chemical was made by
[A]
Charles Darwin and Francis Darwin
[B]
Boysen Jensen and Paal
[C]
Went
[D]
Van Overbeek
Answer: Boysen Jensen and Paal
(3)
Darwin and Darwin discovered that canary grass coleoptile bends towards light only when
[A]
It is 5 cm long
[B]
The Seedling is growing in blue light
[C]
Coleoptile tip is intact and exposed to light
[D]
Nights are cooler
Answer: Coleoptile tip is intact and exposed to light
(4)
Plant response to environment is mainly through
[A]
Induction of dormancy
[B]
Abscission of parts
[C]
Synthesis of pigments
[D]
Growth
(5)
Plant growth is
[A]
Irreversible
[B]
Increase in size
[C]
Localised
[D]
All the above
(6)
The synthesis of amlyase in certain serials is simulated by
[A]
GA
[B]
IAA
[C]
CK
[D]
ABA
(7)
The day neutral plant is
[A]
Tobacco
[B]
Tomato
[C]
Wheat
[D]
Oat
(8)
The long day plant is
[A]
Tomato
[B]
Potato
[C]
Cotton
[D]
Spinach
(9)
The short is
[A]
Tomato
[B]
Sunflower
[C]
Cotton
[D]
Potato
(10)
Substances which originate at the tip of stem and control growth elsewhere are
[A]
Enzymes
[B]
Hormones
[C]
Vitamins
[D]
None of the above
(11)
Gibberellins were first extracted from
[A]
Coleoptile tip
[B]
Root tip
[C]
Fungus
[D]
Bacteria
(12)
The term” vernalisation” was coined by
[A]
Garner and Allard
[B]
Darwin
[C]
Geoffrey
[D]
Lysenko
(13)
Bakanae disease is caused by
[A]
Fungus
[B]
Algae
[C]
Bacteria
[D]
Virus
(14)
Growth is a
[A]
Reversible increase in size
[B]
Reversible increase in shape
[C]
Irreversible increase in size
[D]
None of the above
Answer: Irreversible increase in size
(15)
The rosette habit of cabbage can be changed drastically by the application of
[A]
GA
[B]
IAA
[C]
ABA
[D]
CK
(16)
Ethylene is mainly responsible for
[A]
Formation of flower
[B]
Formation of root hair
[C]
Ripening of fruits
[D]
Formation of fruit
Answer: Ripening of fruits
(17)
The growth of clans dishes from growth of animals in being
[A]
Localised
[B]
Diffused
[C]
Localised and diffused
[D]
None of the above
(18)
The maximum growth phase is
[A]
Lag phase
[B]
Steady phase
[C]
Log Phase
[D]
Senescent phase
(19)
A natural growth regulator is
[A]
NAA
[B]
2,4-D
[C]
Benzaldehyde
[D]
Ethylene
(20)
An excised leaf does not turn yellow if it is induced to root . This is attributed to the synthesis in root of
[A]
Ethylene
[B]
Cytokinins
[C]
Gibberellins
[D]
Auxins
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