MCQ Questions Chapter 2 Sexual Reproduction In Flowering Plants Class 12 Biology

Please refer to MCQ Questions Chapter 2 Sexual Reproduction In Flowering Plants Class 12 Biology with answers provided below. These multiple-choice questions have been developed based on the latest NCERT book for class 12 Biology issued for the current academic year. We have provided MCQ Questions for Class 12 Biology for all chapters on our website. Students should learn the objective based questions for Chapter 2 Sexual Reproduction In Flowering Plants in Class 12 Biology provided below to get more marks in exams.

Chapter 2 Sexual Reproduction In Flowering Plants MCQ Questions

Please refer to the following Chapter 2 Sexual Reproduction In Flowering Plants MCQ Questions Class 12 Biology with solutions for all important topics in the chapter.

MCQ Questions Answers for Chapter 2 Sexual Reproduction In Flowering Plants Class 12 Biology

Question- Coffee plant has chromosome no. of ‘2n’ in its samatic cells, what in the chromosome number in the edible part of coffee seed.
(a) n
(b) 2n
(c) 3n
(d) 4n

Question- Double fertilisation was first discovered by nawaschin (1898) in
(a) Lilium and Frittilaria
(b) Mango and sugarcane
(c) Papaya and Pea
(d) brassica and Condtuft

Question- In Tapegrass (Vallisneria) 
(a) The female flower reach the surface of water by long stalk arid male flowers / pollen grains are released on to the surface
(b) Monoecism is found
(c) Pollen grains or flowers are actively carried by water current
(d) All the above are correct

Question- The ploidy levels of the cells of the nucellus, MMC, the functional megaspore and female gametophyte 
(a) 2N, N, 2N, N
(b) N, N, 2N, N
(c) 2N, 2N, N, N
(d) N, 2N, 2N, N

Question- I. Flowers are small. They are often packed in inflorescence
II. Flowers are colourless, nectarless and odourless
III. Well exposed stamens
IV. Pollen grains – produced in large number, light, non-sticky
V. Flowers often have a single ovule in each ovary
VI. Stigma – large, often feathery.
The above contrivances favour
(a) Self pollination
(b) Anemophily (pollination by wind)
(c) Ornithophily (pollination by birds)
(d) Entemophily (pollination by insects)

Question- Plants of which of these groups are pollinated by the same agercy
(a) Triticum, cocos, mangifera
(b) Ficus, Kigelia, Casurina
(c) Salvia, Mocus, Euphorbia
(d) Bombax, Butea, Bactiria

Question- Which of the following is false about xenogamy?
(a) It is the transfer of pollen grains from anther to stigma of another plant of the same species
(b) It produces genetic variation
(c) it is genetically and ecologically (= functionally) cross pollination
(d) It occurs in Cleistogamous flowers

Question- Which of the following statements is false?
I. Vallisneria and Hydrilla are fresh water plants while sea-grasses (e.g. Zostera) are marine plant.
II. Vallisneria is epihydrophilous while Zostera is hypohydrophilous
III. Pollination in water lily / Lotus (Nymphea) and Eichhornia (water hyacinth) takes place by insects ~ v
IV. In majority of aquatic plants flowers emerg© above the level of water and are pollinated by insects or wind
V. In most of the water pollinated species, pollen grains are protected from wetting due to absence of mucilaginous covering
VI. In hydrophilous plants pollen grains are spherical
(a) All
(b) None
(c) VI
(d) IV

Question- Self-incompatibility 
(a) works the same-way in all plants
(b) Does not have potential agricultural applications
(c) Maintains variation
(d) On the same mechanism of transplant rejection seen in animal

Question- Go through the following points.
I. Dicliny(unisexu ty of flower)
II. Dichogamy (protoandry or protogyny)
III. Self sterility / self incompatibility
IV. Heterostyly
V. Herkogamy (Barrier between anther and stigma of a bisexual homogamous flower)
(a) Geitonogamy
(b) Xenogamy
(c) Allogamy
(d) Autogamy

Question- I. Flowers are usually large, colourful, fragrant
II. Pollen grains are produced in large number
III. Pollen grains are light in weight and non-sticky
IV. Sticky pollen grains
V. Stigma rough and sticky
VI. Stigma is feathery
Which of the above characters favour entomophily?
(a) II, IV, V
(b) I, II, III
(c) lll, IV, V
(d) l,IV, V

Question- Chasmogamy is pollination in 
(a) Bud condition
(b) Closed flowers
(c) Unrelated flowers
(d) Opened flowers

Question- Which of the following would not have an effect on flowering of a particular plant species?
(a) Plant age
(b) Nutritional status
(c) Temperature
(d) Prevailing wind

Question- For the formation of embryo sac, the megaspore mother cell undergoes –
(a) Two meiotic and two mitotic divisions
(b) One meiotic and three mitotic divisions
(c) Two meiotic divisions
(d) One meiotic and two mitotic divisions

Question- Each cell of sporbgenous tissue in anther is –
(a) Microspore
(b) Pollen
(c) Potential pollen or microspore mother cell
(d) Megaspore mother cell

Question-A plant that is self-incompatible has a genotype of S5Sq for S-locus. It recieves pollen from a plant that is S3Sq.Which of the following is most likely to occur?
(a) All of the pollen will germinate, forming pollen tubes
(b) None of the pollen will germinate
(c) About half of the pollen will germinate
(d) Fertilization will occur in about pollinated plan

Question- 8 nucleated embryo sacs are
(a) monopolie only
(b) Bispolic only
(c) Teliasporic only
(d) Any of these

Question- Which of the following are usual floral rewards to pollinating animals?
(a) Shelter and pollen grains
(b) Shelter and fragrance
(c) nectar and pollen grains
(d) Ner*~ ^fragrance

Question- Diversity of structures of the inflorescences, flower and floral parts –
(a) Are responsible for making our garden beautiful
(b) Ensure self pollination
(c) Are adaptations to ensure formation of end products of sexual reproduction
(d) Ensure anemophily

Question- Find out the correct option 
(a) Among animals, insects, particularly bees are the dominant biotic pollinating agents
(b) Often flowers of animal – pollinated plants are specially adapted for particular species of animals
(c) In some species floral rewards like edible nectar, pollen grains, shelter for egg laying are given to pollinating animals
(d) AII

Question- What is the genetic importance of outcrossing?
(a) Outcrossing is a characteristic of pollinators
(b) Outcrossing increases genetic diversity in a population
(c) Outcrossing increases the chances of sterility
(d) Outcrossing promotes inbreeding in a population

Question- Endosperm is completely consumed by developing embryo before seed maturation or exalbuminous / nonendospermic seeds are found in 
(a) Pea, ground nut, beans
(b) Coconut, castor
(c) Maize, wheat
(d) Coconut, Wheet

Question- Which of the following is the tallest flower?
(a) Vallisneria
(b) Lotus
(c) Amorphophallus
(d) Zostera

Question- Which of the following plants provide floral rewards to their pollinating agents 
(a) Zostera and Vallisneria
(b) Hydrilla and Commelina
(c) Amorphophallus and Yucca
(d) SugarcaneandP//?tys

Question- The cells of endosperm have 24 chromosomes. What will be number of chromosomes in the gametes 
(a) 8
(b) 16
(c) 72
(d) 24

Question- seedlers banana is
(a) Parthenocarpic fruit
(b) Multiple fruit
(c) Seven called
(d) Eight celled

Question- During the formation of embryo sac from megaspore mitotic divisions occurs. These mitotic divisions are
(a) Strictly free nuclear
(b) Strictly cellular
(c) Strictly reduction
(d) Strictly cytoplasmic

Question-A monocarpic plant in are which-
(a) Has only are carpel
(b) Flowers and gruits only once in life time and thereafter dies
(c) Produces only seed
(d) None of the above

Question- Wiiich of the following options is correct?
(a) Pollination gives the guarantee of the promotion of post-pollination events that lead to fertilization
(b) The events— “from pollen deposition on stigma until pollen tubes enter the ovule” are together referred to as pollen-pistil interaction
(c) Pollen-pistil interaction is a dynamic process involving pollen recognition followed by only promotion (not rejection) of the pollen.
(d) Pistil has no ability to recognise the pollen, whether right or wrong type.

Question- Which type of association in found in between entomosphilous flower and pollinating apeat
(a) Mutualism
(b) Commercialism
(c) Cooperation
(d) None of these

Question- Repeated self pollination over the generation produces 
(a) New varieties
(b) Better progenies
(c) Inbreeding depression
(d) Elimination of weak traits

Question- The viability of pollen grains depends upon –
(a) Prevailing temperature
(b) Prevailing humidity
(c) Genetic potenti ty of the concerned species
(d) Members of Solanaceae

Question- Entry of the pollen tube through the micropyle is
(a) Anisogany
(b) misogamy
(c) porogamy
(d) chalazogamy

Question- Geitonogamy is –
(a) Functionally cross pollination involving a pollinating agent
(b) genetically it is similar to autogamy since the pollen grains come from the same plant
(c) Functionally and genetically autogamy
(d) Both a and b are correct

Question- The role of double fertilization is angiosperms is to produce
(a) Cotyledom
(b) Endocarp
(c) Endosperm
(d) Hormones

Question- If testa in removed from the water soaked gram seed, the remaining structure in
(a) Full mature embryo
(b) Cotyledom with endosperm
(c) Cotyledom filled with starch
(d) None of the above

Question- Which of the following is correct?
(a) Double fertilization – characteristic of angiosperms
(b) Double fertilization or triple fusion was discovered by Nawaschin
(c) Pollen tube shows tip growth and chemotropic movement
(d) AII

Question- In double fertilization total number of male nuclei and total number of female nuclei involved are
(a) 3, 2 respectively
(b) 2, 3 respectively
(c) 2, 2 respectively
(d) 3, 3 respectively

Question- Which of the following is false?
(a) Wind-pollination is quite common in grasses
(b) Hydrophily is limited to about 30 genera mostly monocots
(c) Both wind and water pollinated flowers are not very colourful and do not produce nectar .
(d) None of the above

Question- The number of chromosomes in radicle is 16. What will be the number of chromosomes in tube nucleus, antipodal cells, definitive nucleus and endosperm respectively?
(a) 8,8,16,24
(b) 8, 8, 16, 16
(0) 16,16,32,48
(d) 8, 8,16,48

Question- Long silky hair coming out of the cob of maize are
(a) Meant for fruit dispersal
(b) Meant for attracting insects
(c) Meant for protecting seeds
(d) Long styles and stigma

Question- Double fertilisatin involves
(a) Fertilisation of the egg by two male gametes
(b) Fertilisation of two egg in the same embryo sac by two sperms brought by one pollen tube
(c) Fertilisation of the egg and the central cell by two sperms brought by different pollen tubes
(d) fertilisation of the egg and central cell by two sperms brought by the same pollen

Question- Albuminous / endospermic seeds are 
(a) Coconut, castor, sunflower
(b) Bean, pea
(c) Groundnut, pea
(d) None

Question- The study of formation, growth and development of new individual from an egg is called 
(a) Embryology 
(b) Embryogenesrs
(c) Morphogenesis
(d) Embryolysis

Question- Anthesis in a phenomena which refers to
(a) Formation of pollen
(b) Development of anther
(c) Operning of flower bud
(d) Reception of pollen

Question- Which of the following is false about emasculation?
(a) During emasculation process, stigma is removed
(b) Emasculated flowers are bagged in order to prevent self-pollination
(c) Emasculation is the removal of stamens before maturation of selected bisexual flowers
(d) It is one of the steps for artificial hybridization

Question-In an angiosperm, male plant is diploid and the female plant in tetraploid, endosperm will be
(a) Haploid
(b) Triploid
(c) Tetraploid
(d) Pentaploid

Question-The most common type of pollination is 
(a) Entemophily
(b) Ornithophily
(c) Malacophily (by snails)
(d) Chiropterophily (by bats)

Question- Which of the following is correct about Parthenium (Carrot grass)?
(a) Parthenium came into India as a contaminant with imported wheat
(b) It has become ubiquitous in occurence
(c) It causes pollen allergy
(d) All of the above

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