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NEET Botany PYQs
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🧬 Botany
📘 Class XI & XII
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408 questions in Botany
Xylem translocates:
A
Water only
B
Water and mineral salts only
C
Water, mineral salts and some organic nitrogen
only
D
Water, mineral salts, some organic nitrogen and
hormones
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Grass leaves curl inwards during very dry weather.
Select the most appropriate reason from the
following:
A
Flaccidity of bulliform cells
B
Closure of stomata
C
Shrinkage of air spaces in spongy mesophyll
D
Tyloses in vessels
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What is the direction of movement of sugars in
phloem?
A
Non-multidirectional
B
Upward
C
Bi-directional
D
Downward
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Thiobacillus is a group of bacteria helpful in carrying out:
A
Denitrification
B
Nitrogen fixation
C
Chemoautotrophic fixation
D
Nitrification
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Respiratiory Quotient (RQ) value of tripalmitin is:
A
0.9
B
0.07
C
0.7
D
0.09
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It takes very long time for pineapple plants to
produce flowers. Which combination of hormones
can be applied to artificially induce flowering in
pineapple plants throughout the year to increase
yield?
A
Gibberellin and Cytokinin
B
Gibberellin and Abscisic acid
C
Cytokinin and Abscisic acid
D
Auxin and Ethylene
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What is the site of perception of photoperiod
necessary for induction of flowering in plants:
A
Lateral buds
B
Pulvinus
C
Leaves
D
Shoot apex
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Which one of the following statements regarding
post-fertilization development in flowering plants is incorrect?
A
Ovules develop into embryo sac
B
Ovary develops into fruit
C
Zygote develops into embryo
D
Central cell develops into endosperm
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Is some plants, the female gamete develops into
embryo without fertilization. This phenomenon is
known as:
A
Parthenogenesis
B
Syngamy
C
Parthenocarpy
D
Autogamy
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In Antirrhinum (Snapdragon), a red flower was
crossed with a white flower and in F1 generation, pink flowers were obtained. When pink flowers were selfed, the F2 generation showed white, red and pink flowers.
A
Law of Segregation does not apply in this
experiment.
B
Ratio of F2 is ¼ (Red): 2/4 (Pink): ¼ (White)
C
Pink colour in F1 is due to incomplete dominance.
D
This experiment does not follow the Principle of
Dominance
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