241.
Movement is peristome teeth is
A
Hydrochasy
B
Xerochasy
C
Chemotatic
D
Chemotropism
Answer :
Xerochasy
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242.
What is a stress hormone? or The hormone produced during adverse environmental conditions is
A
benzyl aminopurine
B
dichlorophenoxy acetic acid
C
ethylene
D
abscisic acid
Answer :
abscisic acid
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243.
What breaks bud dormancy of potato tuber?
A
Gibberellin
B
IAA
C
ABA
D
Zeatin
Answer :
Gibberellin
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244.
An enxyme that can stimulate germiantion of berley seeds is
A
Protease
B
Invertase
C
α-amylase
D
Lipase
Answer :
α-amylase
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245.
A chemical believed to be involved in flowering is
A
gibberellin
B
kinetin
C
florigen
D
IBA
Answer :
florigen
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246.
Name the plant growth regulator which upon spraying on sugarcane crop, increases the length of stem, thus increasing the yield of sugarcane crop.
A
Gibberellin
B
Ethylene
C
Abscisic acid
D
Cytokinin
Answer :
Gibberellin
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247.
The habit of Cabbage plant can be changed drastically by the application of
A
IAA
B
GA3
C
Kinetin
D
ABA
Answer :
GA3
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248.
Which of the following is weed killer
A
2, 4-D
B
NAA
C
GA
D
ABA
Answer :
2, 4-D
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249.
Fruit drop is caused by
A
Les auxin in fruit than in stem
B
More auxin in fruit than in stem
C
Equal distribution of auxin in stem and fruit
D
Absence of auxin in stem and fruit
Answer :
Les auxin in fruit than in stem
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250.
The sytle in Arachis before fertilization is
A
Positive phototropic
B
Negative phototropic
C
Porositve geotropic
D
None of the above
Answer :
Positive phototropic
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