This practice test includes 25 Important questions from the chapter sexual reproduction in flowering plants class 12th Biology.
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Q.1.
The anther wall consists of four wall layers where
- tapetum lies just inner to endothecium
- middle layers lie between endothecium and tapetum
- endothecium lies inner to middle layers
- tapetum lies next to epidermis
Answer:
(b) middle layers lie between endothecium and tapetum
Explanation: middle layers lie between endothecium and tapetum
Explanation: middle layers lie between endothecium and tapetum
Q.2.
Anther is generally
- monosporangiate
- bisporangiate
- tetrasporangiate
- trisporangiate.
Answer:
(c) tetrasporangiate
Explanation: tetrasporangiate
Explanation: tetrasporangiate
Q.3.
The stamens represent
- microsporangia
- male gametophyte
- male gametes
- microsporophylls.
Answer:
(d) microsporophylls.
Explanation: The stamens represent microsporophylls
Explanation: The stamens represent microsporophylls
Q.4.
Nonessential floral organs in a flower are
- sepals and petals
- anther and ovary
- stigma and filament
- petals only.
Answer:
(a) sepals and petals
Explanation: Nonessential floral organs in a flower are sepals and petals
Explanation: Nonessential floral organs in a flower are sepals and petals
Q.5.
Science of cultivation, breeding, marketing and arrangement of flowers is called
- arboriculture
- floriculture
- horticulture
- anthology
Answer:
(b) floriculture
Explanation: Science of cultivation, breeding, marketing and arrangement of flowers is called floriculture
Explanation: Science of cultivation, breeding, marketing and arrangement of flowers is called floriculture
Q.6.
From among the sets of terms given below, identify those that are associated with the gynoecium
- Stigma, ovule, embryo sac, placenta
- Thalamus, pistil, style, ovule
- Ovule, ovary, embryo sac, tapetum
- Ovule, stamen, ovary, embryo sac
Answer:
(d) Ovule, stamen, ovary, embryo sac
Explanation: Rest are not associated with gynoceium
Explanation: Rest are not associated with gynoceium
Q.7.
During microsporogenesis, meiosis occurs in
- endothecium
- microspore mother cells
- microspore tetrads
- pollen grains
Answer:
(b) microspore mother cells
Explanation: meiosis occurs in microspore mother cells
Explanation: meiosis occurs in microspore mother cells
Q.8.
The outermost and innermost wall layers of microsporangium in an anther are respectively
- endothecium and tapetum
- epidermis and endodermis
- epidermis and middle layer
- epidermis and tapetum.
Answer:
(d) epidermis and tapetum.
Explanation: epidermis and tapetum.
Explanation: epidermis and tapetum.
Q.9.
Embryo sac is to ovule as _______ is to an anther.
- Stamen
- filament
- pollen grain
- androecium
Answer:
(c) pollen grain
Q.10.
An embryo may sometimes develop from any cell of embryo sac other than egg. It is termed as
- apospory
- apogamy
- parthenogenesis
- parthenocarpy
Answer:
(b) apogamy
Explanation: apogamy is development of embryo from any cell of embryo sac other than egg.
Explanation: apogamy is development of embryo from any cell of embryo sac other than egg.
Q.11.
Polyembryony commonly occurs in
- banana
- tomato
- Potato
- Citrus
Answer:
(d) Citrus
Explanation: Citrus
Explanation: Citrus
Q.12.
Indentify the wrong statement regarding post-fertilisation development
- The ovary wall develops into pericarp.
- The outer integument of ovule develops into tegmen
- The fusion nucleus (triple nucleus) develops into endosperm.
- The ovule develops into seed.
Answer:
(b) The outer integument of ovule develops into tegmen
Explanation: The outer integument of ovule develops into seed.
Explanation: The outer integument of ovule develops into seed.
Q.13.
Persistent nucellus is called as _______ and is found in _______.
- perisperm, black pepper
- perisperm, groundnut
- endosperm, black pepper
- endosperm groundnut
Answer:
(a) perisperm, black pepper
Q.14.
In albuminous seeds, food is stored in _______ and in non albuminous seeds, it is stored in _______
- endosperm, cotyledons
- cotyledons, endosperm
- nucellus, cotyledons
- endosperm, radicle
Answer:
(a) endosperm, cotyledons
Q.15.
Endospermic seeds are found in
- castor
- barley
- Coconut
- All of these
Answer:
(d) All of these
Explanation: All of these are endosperm seeds.
Explanation: All of these are endosperm seeds.
Q.16.
Spiny or sticky pollen grains and large, attractively coloured flowers are associated with
- hydrophily
- entomophily
- ornithophily
- anemophily
Answer:
(b) entomophily
Explanation: entomophily involves insects.
Explanation: entomophily involves insects.
Q.17.
Which of the following is not a water pollinated plant ?
- Zostera
- Vallisneria
- Hydrilla
- Cannabis
Answer:
(d) Cannabis
Explanation: Cannabis isn’t pollinated by water
Explanation: Cannabis isn’t pollinated by water
Q.18.
Plants with ovaries having only one or a few ovules are generally pollinated by
- bees
- Butterflies
- birds
- Wind
Answer:
(d) Wind
Explanation: Ovaries with many ovules are pollinated by birds or insects.
Explanation: Ovaries with many ovules are pollinated by birds or insects.
Q.19.
Feathery stigma occurs in
- pea
- wheat
- Datura
- Caesalpinia
Answer:
(b) wheat
Q.20.
Male and female flowers are present on different plants (dioecious) to ensure xenogamy, in
- papaya
- bottle gourd
- maize
- all of these.
Answer:
(a) papaya
Explanation: papaya
Explanation: papaya
Q.21.
Even in absence of pollinating agents seed-setting is assured in
- Commelina
- Zostera
- Salvia
- Fig
Answer:
(a) Commelina
Explanation: It is only seen in Commelina.
Explanation: It is only seen in Commelina.
Q.22.
Both chasmogamous and cleistogamous flowers are present in
- Helianthus
- Commelina
- Rosa
- Gossypium
Answer:
(b) Commelina
Explanation: Commelina shows Both chasmogamous and cleistogamous flowers
Explanation: Commelina shows Both chasmogamous and cleistogamous flowers
Q.23.
Polygonum type of embryo sac is
- 8 – nucleate, 7 – celled
- 8 – nucleate, 8 – celled
- 7 – nucleate, 7 – celled
- 4 – nucleate, 3 – celled
Answer:
(a) 8 – nucleate, 7 – celled
Explanation: 8 – nucleate, 7 – celled
Explanation: 8 – nucleate, 7 – celled
Q.24.
The female gametophyte of a typical dicot at the time of fertilisation is
- 8 – celled
- 7 – celled
- 6 – celled
- 5 – celled
Answer:
(b) 7 – celled
Q.25.
What is the function of filiform apparatus in an angiospermic embryo sac?
- Brings about opening of the pollen tube
- Guides the pollen tube into a synergid
- Prevents entry of more than one pollen tube into a synergid
- None of these
Answer:
(b) Guides the pollen tube into a synergid
Explanation: Guides the pollen tube into a synergid
Explanation: Guides the pollen tube into a synergid
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