MCQs For NCERT Class 12 Biology Chapter 2 Sexual Reproduction in Flowering Plants

Please refer to the MCQ Questions for Class 12 Biology Chapter 2 Sexual Reproduction in Flowering Plants with Answers. The following Sexual Reproduction in Flowering Plants Class 12 Biology MCQ Questions has been designed based on the latest syllabus and examination pattern for Class 12. Our experts have designed MCQ Questions for Class 12 Biology with Answers for all chapters in your NCERT Class 12 Biology book.

Sexual Reproduction in Flowering Plants Class 12 MCQ Questions with Answers

See below Sexual Reproduction in Flowering Plants Class 12 Biology MCQ Questions, solve the questions and compare your answers with the solutions provided below.

Question. Which is the most common type of embryo sac in angiosperms ?                                     
(a) Tetrasporic with one mitotic stage of divisions
(b) Monosporic with three sequential mitotic divisions
(c) Monosporic with two sequential mitotic divisions
(d) Bisporic with two sequential mitotic divisions

Question. What type of pollination takes place in Vallisneria?                                       
(a) Pollination occurs in submerged condition by water.
(b) Flowers emerge above surface of water, and pollination occurs by insects.
(c) Flowers emerge above water surface, and pollen is carried by wind.
(d) Male flowers are carried by water currents to female flowers at surface of water.

Question. In which one of the following, both autogamy and geitonogamy are prevented?                           
(a) Wheat
(b) Papaya
(c) Castor
(d) Maize

Question. Pollen grains can be stored for several years in liquid nitrogen having a temperature of                               
(a) –120°C
(b) –80°C
(c) –196°C
(d) –160°C. 

Question. The plant parts which consist of two generationsone within the other           
(1) pollen grains inside the anther
(2) germinated pollen grain with two male gametes
(3) seed inside the fruit
(4) embryo sac inside the ovule
(a) (1) only
(b) (1), (2), and (3)
(c) (3) and (4)
(d) (1) and (4).

Question. In water hyacinth and water lily, pollination takes place by                           
(a) insects or wind
(b) water currents only
(c) wind and water
(d) insects and water.

Question. Functional megaspore in an angiosperm develops into an                                   
(a) endosperm
(b) embryo sac
(c) embryo
(d) ovule. 

Question. Attractants and rewards are required for                                 
(a) entomophily
(b) hydrophily
(c) cleistogamy
(d) anemophily.

Question. Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by       
(a) bee
(b) wind
(c) bat
(d) water. 

Question. A dioecious flowering plant prevents both                                   
(a) autogamy and geitonogamy
(b) geitonogamy and xenogamy
(c) cleistogamy and xenogamy
(d) autogamy and xenogamy.

Question. In majority of angiosperms,                                               
(a) egg has a filiform apparatus
(b) there are numerous antipodal cells
(c) reduction division occurs in the megaspore mother cells
(d) a small central cell is present in that embryo sac. 

Question. Which of the following has proved helpful in preserving pollen as fossils?                                   
(a) Pollenkitt
(b) Cellulosic intine
(c) Oil content
(d) Sporopollenin

Question. Winged pollen grains are present in                               
(a) mustard
(b) Cycas
(c) mango
(d) Pinus. 

Question. Which one of the following statements is not true?                                             
(a) Pollen grains of many species cause severe allergies.
(b) Stored pollen in liquid nitrogen can be used in the crop breeding programmes.
(c) Tapetum helps in the dehiscence of anther.
(d) Exine of pollen grains is made up of sporopollenin. 

Question. Which of the following statements is not correct?                                         
(a) Pollen germination and pollen tube growth are regulated by chemical components of pollen interacting with those of the pistil.
(b) Some reptiles have also been reported as pollinators in some plant species.
(c) Pollen grains of many species can germinate on the stigma of a flower, but only one pollen tube of the same species grows into the style.
(d) Insects that consume pollen or nectar without bringing about pollination are called pollen/ nectar robbers. 

Question. Proximal end of the filament of stamen is attached to the                                   
(a) placenta
(b) thalamus or petal
(c) anther
(d) connective.

Question. Pollination in water hyacinth and water lily is brought about by the agency of                                   
(a) water
(b) insects or wind
(c) birds
(d) bats. 

Question. The ovule of an angiosperm is technically equivalent to                             
(a) megasporangium
(b) megasporophyll
(c) megaspore mother cell
(d) megaspore. 

Question. Male gametophyte in angiosperms produces                               
(a) single sperm and two vegetative cells
(b) three sperms
(c) two sperms and a vegetative cell
(d) single sperm and a vegetative cell.

Question. Which of the following are the important floral rewards to the animal pollinators ?                                 
(a) Floral fragrance and calcium crystals
(b) Protein pellicle and stigmatic exudates
(c) Colour and large size of flower
(d) Nectar and pollen grains 

Question. Which one of the following may require pollinators, but is genetically similar to autogamy?                                   
(a) Apogamy
(b) Cleistogamy
(c) Geitonogamy
(d) Xenogamy

Question. Filiform apparatus is characteristic feature of                                             
(a) aleurone cell
(b) synergids
(c) generative cell
(d) nucellar embryo.

Question. In angiosperms, microsporogenesis and megasporo -genesis                                   
(a) involve meiosis
(b) occur in ovule
(c) occur in anther
(d) form gametes without further divisions. 

Question. Which one of the following statements is not true?                                           
(a) The flowers pollinated by flies and bats secrete foul odour to attract them.
(b) Honey is made by bees by digesting pollen collected from flowers.
(c) Pollen grains are rich in nutrients and they are used in the form of tablets and syrups.
(d) Pollen grains of some plants cause severe allergies and bronchial afflictions in some people. 

Question. The hilum is a scar on the                                           
(a) fruit, where style was present
(b) seed, where micropyle was present
(c) seed, where funicle was attached
(d) fruit, where it was attached to pedicel

Question. Transmission tissue is characteristic feature of                                         
(a) dry stigma
(b) wet stigma
(c) hollow style
(d) solid style.

Question. Function of filiform apparatus is to                                     
(a) recognise the suitable pollen at stigma
(b) stimulate division of generative cell
(c) produce nectar
(d) guide the entry of pollen tube.

Question. Advantage of cleistogamy is                                                 
(a) no dependence on pollinators
(b) vivipary
(c) higher genetic variability
(d) more vigorous offspring. 

Question. Megasporangium is equivalent to                                           
(a) nucellus
(b) ovule
(c) embryo sac
(d) fruit. 

Question. Geitonogamy involves                                             
(a) fertilisation of a flower by the pollen from another flower of the same plant
(b) fertilisation of a flower by the pollen from the same flower
(c) fertilisation of a flower by the pollen from a flower of another plant in the same population
(d) fertilisation of a flower by the pollen from a flower of another plant belonging to a distant population. 

Question. Pollen tablets are available in the market for                                         
(a) in vitro fertilisation
(b) breeding programmes
(c) supplementing food
(d) ex situ conservation.

Question. Which one of the following statements is correct?                                       
(a) Endothecium produces the microspores.
(b) Tapetum nourishes the developing pollen.
(c) Hard outer layer of pollen is called intine.
(d) Sporogenous tissue is haploid. 

Question. Animal vectors are required for pollination in                                   
(a) Vallisneria
(b) mulberry
(c) cucumber
(d) maize.

Question. Which of the following statements is correct?                                     
(a) Sporopollenin can be degraded by enzymes.
(b) Sporopollenin is made up of inorganic materials.
(c) Sporopollenin can withstand high temperatures as well as strong acids and alkalis.
(d) Sporopollenin can withstand high temperatures but not strong acids. 

Question. Both, autogamy and geitonogamy are prevented in                                             
(a) papaya
(b) cucumber
(c) castor
(d) maize. 

Question. An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is                                   
(a) cuticle
(b) sporopollenin
(c) lignin
(d) cellulose.

Question. Even in absence of pollinating agents seed-setting is assured in                                         
(a) Commelina
(b) Zostera
(c) Salvia
(d) fig.

Question. What is the function of germ pore?                                     
(a) Emergence of radicle
(b) Absorption of water for seed germination
(c) Initiation of pollen tube
(d) Release of male gametes 

Question. Plants with ovaries having only one or a few ovules,                               
are generally pollinated by
(a) bees
(b) butterflies
(c) birds
(d) wind. 

Question. Filiform apparatus is a characteristic feature of                             
(a) suspensor
(b) egg
(c) synergid
(d) zygote. 

Question. Which one of the following pollinations is autogamous?                                   
(a) Geitonogamy
(b) Xenogamy
(c) Chasmogamy
(d) Cleistogamy 

Question. Megaspores are produced from the megaspore mother cells after                                 
(a) mitotic division
(b) formation of thick wall
(c) differentiation
(d) meiotic division. 

Question. Which one of the following statements is correct?                                       
(a) Cleistogamous flowers are always autogamous.
(b) Xenogamy occurs only by wind pollination.
(c) Chasmogamous flowers do not open at all.
(d) Geitonogamy involves the pollen and stigma of flowers of different plants.

Question. Wind pollination is common in                                             
(a) legumes
(b) lilies
(c) grasses
(d) orchids. 

Question. In angiosperms, functional megaspore develops into                           
(a) embryo sac
(b) ovule
(c) endosperm
(d) pollen sac.

Question. Transfer of pollen grains from the anther to the stigma of another flower of the same plant is called                                
(a) xenogamy
(b) geitonogamy
(c) karyogamy
(d) autogamy

Question. Wind pollinated flowers are                                           
(a) small, brightly coloured, producing large number of pollen grains
(b) small, producing large number of dry pollen grains
(c) large producing abundant nectar and pollen
(d) small, producing nectar and dry pollen.

Question. Unisexuality of flowers prevents                                   
(a) geitonogamy, but not xenogamy
(b) autogamy and geitonogamy
(c) autogamy, but not geitonogamy
(d) both geitonogamy and xenogamy.

Question. Which one of the following is resistant to enzyme action?                                           
(a) Pollen exine
(b) Leaf cuticle
(c) Cork
(d) Wood fibre

Question. Male gametes in angiosperms are formed by the division of                                     
(a) generative cell
(b) vegetative cell
(c) microspore mother cell
(d) microspore.