Reproduction in Flowering Plants — Practice Questions

Free NEET Biology multiple-choice questions on Reproduction in Flowering Plants. Attempt each question and reveal the answer with a full explanation.

Through which cell of the embryo sac, does the pollen tube enter the embryo sac- Persistant synergid Egg cell Central cell Degenerated synergid Meiosis takes place in Meiocyte Conidia Gemmule Megaspore Advantage of cleistogamy is Higher genetic variability More vigorous offspring No dependence on pollinators Vivipary Geitonogamy involves : fertilization of a flower by the pollen from another flower of the same plant. fertilization of a flower by the pollen from the same flower. fertilization of a flower by the pollen from a flower of another plant in the same population. fertilization of a flower by the pollen from a flower of another plant belonging to a distant population. Pollen tablets are available in the market for : In vitro fertilization Breeding programmes Supplementing food Ex situ conservation Function of filiform apparatus is to :- Recognize the suitable pollen at stigma Stimulate division of generative cell Produce nectar Guide the entry of pollen tube The coconut water from tender coconut represents:- Endocarp Fleshy mesocarp Free nuclear proembryo Free nuclear endosperm Seed formation without fertilization in flowering plants involves the process of :- (1) Sporulation (2) Budding (3) Somatic hybridization (4) Apomixis Pollen grains can be stored for years in liquid nitrogen, maintained at temperature : −120°C −20°C −70°C −196°C Double fertilization is Fusion of two male gametes with one egg Fusion of one male gamete with two polar nuclei Fusion of two male gametes of a pollen tube with two different eggs Syngamy and triple fusion Pollen grains can be stored for several years in liquid nitrogen having a temperature of -196 C -80 C -120 C -160 C In a type of apomixis known as adventive embryony, embryos develop directly from the - Synergids or antipodals in an embryo sac Nucellus or integuments Zygote Accessory embryo sacs in the ovule Which of the following has proved helpful in preserving pollen as fossils? Oil content Cellulosic intine Pollenkitt Sporopollenin Which one of the following statements regarding post-fertilization development in flowering plants is incorrect? (1) Ovules develop into embryo sac (2) Ovary develops into fruit (3) Zygote develops into embryo (4) Central cell develops into endosperm What is the fate of the male gametes discharged in the synergid? One fuses with the egg and other fuses with central cell nuclei. One fuses with egg other(s) degenerate (s) in the synergid. All fuse with the egg. One fuses with the egg, other(s) fuse(s) with synergid nucleus. The body of the ovule is fused within the funicle at (1) Micropyle (2) Nucellus (3) Chalaza (4) Hilum In water hyacinth and water lily, pollination takes place by : Water currents only Wind and water Insects and water Insects or wind A typical angiosperm embryo sac at maturity is: 7-nucleate and 8-celled 7-nucleate and 7-celled 8-nucleate and 8-celled 8-nucleate and 7-celled The term used for transfer of pollen grains from anthers of one plant to stigma of a different plant which, during pollination, brings genetically different types of pollen grains to stigma, is : Geitonogamy Chasmogamy Cleistogamy Xenogamy Given below are two statements : Statement I : Cleistogamous flowers are invariably autogamous Statement II : Cleistogamy is disadvantageous as there is no chance for cross pollination In the light of the above statements, choose the correct answer from the options given below : Both Statement I and Statement II are incorrect Statement I is correct but Statement II is incorrect Statement I is incorrect but Statement II is correct Both Statement I and Statement II are correct Identify the incorrect statement related to Pollination : Pollination by wind is more common amongst abiotic pollination Flowers produce foul odours to attract flies and beetles to get pollinated Moths and butterflies are the most dominant pollinating agents among insects Pollination by water is quite rare in flowering plants Large, colourful, fragrant flowers with nectar are seen in Insect pollinated plants Bird pollinated plants Bat pollinated plants Wind pollinated plants Why is vivipary an undersirable character for annual crop plants - It reduces the vigour of the plant The seeds exhibit long dormancy It adversely affects the fertility of the plant The seeds cannot be stored under normal conditions for the next season What is the function of tassels in the corn cob? To attract insects To trap pollen grains To disperse pollen grains To protect seeds How many meiotic and mitotic divisions need to occur for the development of a mature female gametophyte from the megaspore mother cell in an angiosperm plant? No Meiosis and 2 Mitosis 2 Meiosis and 3 Mitosis 1 Meiosis and 2 Mitosis 1 Meiosis and 3 Mitosis In the seeds of cereals, the outer covering of endosperm separates the embryo by a protein-rich layer called : Aleurone layer Coleoptile Coleorhiza Integument Arrange the following in the correct developmental sequence related to microsporogenesis : A. Microspore tetrads B. Sporogenous tissue C. Pollen grains D. Pollen mother cells Choose the correct answer from the options given below : A, D, C, B D, A, C, B B, D, C, A B, D, A, C Which one of the following is a triploid cell? Synergid Primary endosperm cell Central cell Zygote Which one of the following types of pollination brings genetically different types of pollen grains to the stigma? Geitonogamy Xenogamy Cleistogamy Autogamy Which one of the following is an appropriate example of sexual deceit? Sea anemone and clown fish Ophrys and bumblebee Female wasp and fig Cuckoo and crow What would be the number of chromosomes in the cells of the aleurone layer in a plant species with 8 chromosomes in its synergids ? 16 24 32 8 Which one of the following statements is not true? (1) Tapetum helps in the dehiscence of anther (2) Exine of pollen grains is made up of sporopollenin (3) Pollen grains of many species cause severe allergies (4) Stored pollen in liquid nitrogen can be used in the crop breeding programmes Which of the following statements is not correct ? 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. Insects that consume pollen or nectar without bringing about pollination are called pollen/nectar robbers. Pollen germination and pollen tube growth are regulated by chemical components of pollen interacting with those of the pistil. Some reptiles have also been reported as pollinators in some plant species. The arrangement of the nuclei in a normal embryo sac in the dicot plants is- (1) 2 + 4 + 2 (2) 3 + 2 + 3 (3) 2 + 3 + 3 (4) 3 + 3 + 2 What is not true for an angiospermic embryo sac ? One male gamete is discharged into it during fertilization It is present within an ovule It represents female gametophyte Its formation is preceded by meiosis Choose the correct sequence representing the ploidy of Nucellus; Megaspore mother cell; Megaspore; Egg cell; Zygote; A polar nucleus of embryo sac; Secondary nucleus and Primary endosperm nucleus. n; 2n; 2n; n; 2n; n; 2n; and 2n 2n; 2n; n; 2n; n; 2n; 3n; and 2n 2n; 2n; n; n; 2n; n; 2n; and 3n 2n; n; n; 2n; 3n; 2n; n; and 3n The plant parts which consist of two generations - one within the other (a) Pollen grains inside the anther (b) Germinated pollen grain with two male gametes (c) Seed inside the fruit (d) Embryo sac inside the ovule (1) (a), (b) and (c) (2) (c) and (d) (3) (a) and (d) (4) (a) only In some members of which of the following pairs of families, pollen grains retain their viability for months after release? Poaceae : Leguminosae Poaceae ; Solanaceae Rosaceae ; Leguminosae Poaceae ; Rosaceae In angiosperm, the haploid, diploid and triploid structures of a fertilized embryo sac sequentially are : Synergids, Primary endosperm nucleus and zygote Antipodals, synergids, and primary endosperm nucleus Synergids, Zygote and Primary endosperm nucleus Synergids, antipodals and Polar nuclei Identify the set of correct statements: A. The flowers of Vallisneria are colourful and produce nectar. B. The flowers of water lily are not pollinated by water. C. In most of water-pollinated species, the pollen grains are protected from wetting. D. Pollen grains of some hydrophytes are long and ribbon like. E. In some hydrophytes, the pollen grains are carried passively inside water. Choose the correct answer from the options given below. C, D and E only A, B, C and D only A, C, D and E only B, C, D and E only Identify the correct description about the given figure: Wind pollinated plant inflorescence showing flowers with well exposed stamens. Water pollinated flowers showing stamens with mucilaginous covering. Cleistogamous flowers showing autogamy. Compact inflorescence showing complete autogamy Given below are two statements : One is labelled as Assertion (A) and other is labelled as Reason (R). Assertion (A) : Cells of the tapetum possess dense cytoplasm and generally have more than one nucleus. Reason (R) : Presence of more than one nucleus in the tapetum increases the efficiency of nourishing the developing microspore mother cells. In light of the above statements, choose the most appropriate answer from the options given below: A is false but R is true Both A and R are true and R is the correct explanation of A Both A and R are true but R is NOT the correct explanation of A A is true but R is false Given below are two statements : One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : A typical unfertilised, angiosperm embryo sac at maturity is 8 nucleate and 7-celled. Reason (R) : The egg apparatus has 2 polar nuclei. In the light of the above statements, choose the correct answer from the options given below : A is false but R is true Both A and R are true and R is the correct explanation of A Both A and R are true but R is NOT the correct explanation of A A is true but R is false Given below are two statements : One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : Both wind and water pollinated flowers are not very colourful and do not produce nectar. Reason (R) : The flowers produce enormous amount of pollen grains in wind and water pollinated flowers. In the light of the above statements, choose the correct answer from the options given below: A is false but R is true Both A and R are true and R is the correct explanation of A Both A and R are true but R is NOT the correct explanation of A A is true but R is false In a cereal grain the single cotyledon of embryo is represented by - (1) Coleorhiza (2) Scutellum (3) Prophyll (4) Coleoptile Match List-I with List-II. Choose the correct answer from the options given below : A-II, B-III, C-I A-II, B-I, C-III A-III, B-II, C-I A-I, B-III, C-II How many theca are present in each lobe of a typical bilobed angiosperm anther ? 2 6 8 12 Which of the following in female gametophyte of an angiosperm helps in guiding the pollen tube for fertilizing the eggs? Antipodals Synergids Central cells Polar nucleus Which of the following plant produces non-albuminous seeds? Wheat Maize Barley Pea If the diploid chromosome number of typical angiosperm is 36, what would be the chromosome number in its endosperm? 18 36 54 72 Which one of the following is surrounded by a callose wall? male gamete egg pollen grain microspore mother cell Male gametes in angiosperms are formed by the division of generative cell vegetative cell microspore mother cell microspore. Megasporangium is equivalent to Embryo sac Fruit Nucellus Ovule Which one of the following statements is correct? Hard outer layer of pollen is called intine Sporogenous tissue is haploid Endothecium produces the microspores Tapetum nourishes the developing pollen