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📘 MCQ Test
Question 1
Pollen–pistil interaction mainly involves
Formation of pollen grains
Growth of pollen tube
Germination of ovule
Formation of embryo
Question 2
The compatible pollen grain on stigma
Bursts immediately
Fails to germinate
Germinates to form pollen tube
Forms embryo directly
Question 3
Incompatible pollen grain is
Accepted and nourished
Rejected by pistil
Always from same species
Always diploid
Question 4
The stigma surface is adapted for
Protection
Absorption of water
Pollen germination
Embryo formation
Question 5
Pollen tube enters ovule through
Chalaza
Funiculus
Micropyle
Integument
Question 6
Recognition of compatible pollen occurs at
Ovary
Ovule
Stigma
Embryo sac
Question 7
The pollen tube grows through
Xylem
Phloem
Style tissue
Cortex
Question 8
Which chemical helps pollen tube growth?
Auxin
Gibberellin
Sugars and boron
Cytokinins
Question 9
Pollen tube carries
One male gamete
Two male gametes
One female gamete
Zygote
Question 10
In angiosperms, pollen grain is
Multicellular
3-celled at shedding
2-celled at shedding
Unicellular
Question 11
Which cell forms pollen tube?
Generative cell
Male gamete
Vegetative cell
Synergid
Question 12
Generative cell divides to form
Synergids
Two male gametes
Zygote
Endosperm
Question 13
Self-incompatibility prevents
Cross-pollination
Self-pollination
Fertilization
Germination
Question 14
Self-incompatibility is controlled by
Environment
Hormones
Genetic mechanism
Enzymes only
Question 15
Entry of pollen tube through chalaza is
Porogamy
Chalazogamy
Mesogamy
Autogamy
Question 16
Entry of pollen tube through integuments is
Porogamy
Chalazogamy
Mesogamy
Xenogamy
Question 17
Synergids help in
Endosperm formation
Attracting pollen tube
Nutrition to embryo
Protection of ovule
Question 18
Filiform apparatus is present in
Egg cell
Antipodal cells
Synergids
Central cell
Question 19
Pollen tube releases male gametes into
Central cell
Synergid
Egg cell
Antipodal cell
Question 20
Pollen–pistil interaction ensures
Fertilization always
Species specificity
Seed dispersal
Seed germination
Question 21
Which structure nourishes pollen tube?
Ovary
Style
Stigma
Ovule
Question 22
Incompatibility reaction can occur at
Stigma only
Style only
Ovary only
Any level of pistil
Question 23
Pollen tube growth is
Random
Chemotropic
Geotropic
Phototropic
Question 24
A compatible pollen grain will
Shrink
Burst
Germinate
Degenerate
Question 25
Male gametes are formed by
Meiosis
Mitosis
Fusion
Reduction
Question 26
Pollen tube is absent in
Gymnosperms
Angiosperms
Bryophytes
Pteridophytes
Question 27
The stigma is usually
Dry or wet
Always dry
Always wet
Hard
Question 28
In dry stigma, pollen recognition is mediated by
Sugars
Lipids and proteins
Water
Hormones
Question 29
Pollen tube nucleus is
Haploid
Diploid
Triploid
Tetraploid
Question 30
Pollen tube growth stops when
It reaches stigma
It reaches style
Male gametes are released
Endosperm forms
Question 31
Which is NOT part of pollen–pistil interaction?
Recognition
Acceptance
Rejection
Seed dispersal
Question 32
Self-incompatibility promotes
Inbreeding
Hybridization
Cross-pollination
Self-fertilization
Question 33
Pollen grains of same species but different plant are
Incompatible
Compatible
Always rejected
Sterile
Question 34
Pollen tube enters embryo sac near
Antipodal cells
Central cell
Egg apparatus
Chalaza
Question 35
In pollen tube, the leading nucleus is
Male nucleus
Egg nucleus
Vegetative nucleus
Zygote nucleus
Question 36
Pollen tube grows faster in
Incompatible pistil
Compatible pistil
Dry stigma
Damaged stigma
Question 37
The main role of pistil is
Seed formation
Pollination
Fertilization support
Photosynthesis
Question 38
Pollen tube growth is essential for
Pollination
Double fertilization
Meiosis
Embryo sac formation
Question 39
Which promotes pollen tube growth?
ABA
Ethylene
Auxin
Boron
Question 40
Pollen tube wall is made of
Cellulose
Pectin and callose
Lignin
Suberin
Question 41
Pollen–pistil interaction is species-specific because of
Size of pollen
Genetic compatibility
Shape of pistil
Environment
Question 42
The egg apparatus consists of
Egg + two synergids
Egg + antipodals
Central cell + egg
Synergids only
Question 43
Failure of pollen germination indicates
Fertilization
Compatibility
Incompatibility
Pollination
Question 44
Pollen tube guidance is controlled by
Mechanical force
Chemical attractants
Gravity
Light
Question 45
Which tissue transmits pollen tube?
Cortex
Vascular tissue
Transmitting tissue
Epidermis
Question 46
Self-incompatibility was first discovered in
Wheat
Brassica
Maize
Rice
Question 47
Pollen tube releases enzymes to
Digest embryo sac
Digest style tissue
Digest synergid wall
Digest ovule
Question 48
Pollen grain germinates only when
It is viable
It lands on stigma
It is compatible
All of the above
Question 49
Rejection of pollen is an example of
Immune response
Mechanical response
Genetic control
Hormonal control
Question 50
The ultimate goal of pollen–pistil interaction is
Pollination
Pollen germination
Fertilization
Seed dispersal
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