Description : When the diploid embryosac is formed from the cells of nucellus, it is known as
Last Answer : When the diploid embryosac is formed from the cells of nucellus, it is known as – Apospory
Description : When a diploid embryosac is formed from a megaspore mother cell without meiosis, it is called as
Last Answer : When a diploid embryosac is formed from a megaspore mother cell without meiosis, it is called as – Diplospory
Description : Development of Sporophyte from gametophyte tissue without fusion of gametes is: (a) Apospory (b) Apogamy (c) Apomixis (d) Parthenogenesis
Last Answer : Ans. ((b))
Description : Development of saprophyte from gametophyte, is called (a) Apomixis (b) Apospory (c) Apogamy (d) Dip1ospory
Last Answer : Ans. ((c))
Description : Nucellus and embryosac both are curved in –
Last Answer : Nucellus and embryosac both are curved in – Amphitropus ovule
Description : The formation of multivalents at meiosis in diploid organism is due to: (a) Monosomy (b) Delection (c) Inversion (d) Reciprocal translocation
Last Answer : Ans. ((d))
Description : Formation of gametophyte directly from sporophyte without meiosis is (a) apospory (b) apogamy (c) parthenogenesis (d) amphimixis.
Last Answer : (a) apospory
Description : Formation of 8-nucleate embryosac by pollen grains is also called as
Last Answer : Formation of 8-nucleate embryosac by pollen grains is also called as – Nemec phenomenon
Description : Egg cell without synergids is found in embryosac of
Last Answer : Egg cell without synergids is found in embryosac of – Plumbagella type
Description : Occurrence of more than one embryo in a seed is known as: a) Polyembryony b) parthenocarpy c) Apomixis d) Embryogeny
Last Answer : Ans: a) Polyembryony
Description : .In Pinus, the wings of the seed develops from (a) ovuliferous scale (b) integument (c) nucellus (d) bract.
Last Answer : (a) ovuliferous scale
Description : .In a type of apomixis known as adventive embryony, embryos develop directly from the (a) nucellus or integuments (b) zygote (c) synergids or antipodals in an embryo sac (d) accessory embryo sacs in the ovule
Last Answer : (a) nucellus or integuments
Description : When multiple embryo develop from different embryosac it is called as
Last Answer : When multiple embryo develop from different embryosac it is called as – False polyembryony
Description : When embryosac receives two or more than two pollen tubes the sperm nucleus fusing with the egg nucleus may be derived from one pollen tube and one fusing with the polar nuclei may be derived from other pollen tube, the phenomenon is termed as
Last Answer : When embryosac receives two or more than two pollen tubes the sperm nucleus fusing with the egg nucleus may be derived from one pollen tube and one fusing with the polar nuclei may be derived from other pollen tube, the phenomenon is termed as – Heterofertilization
Description : The most common type of embryosac in Angiosperms is
Last Answer : The most common type of embryosac in Angiosperms is – Polygonum type
Description : What are the cells found in the egg apparatus of matured embryosac?
Last Answer : Ans: Two synergids and one egg cell
Description : Hormogonia are vegetative reproductive structure of: (a) Spirogyra (b) Ulothrix (c) Oscillatoria (d) Yeast
Description : The ovule in which embryo sac become horse shoe shaped in: (a) Amphitropous (b) Camphylotropous (c) Orthotropous (d) Anatropous Ans. (a) .................................. ... TEST SAMPLE QUESTIONS 1. Caruncle develops-from: (a) Outer integument (b) Ctyledon (c) Funiculus (d) Inner integuments
Last Answer : Ans. ((a))
Description : Haploid cells belong to: (a) Integument, pollen grain, endosperm (b) Embryo, endosperm and pollen grain (c) Megaspore, pollen grain, antipodal (d) Integument, pollen grain and antipodal
Description : When polyembryony is due to activation of some sporophytic cells of ovule, it is called as
Last Answer : When polyembryony is due to activation of some sporophytic cells of ovule, it is called as – Adventive polyembryony
Description : In spite of several angiospermic features Gnetum is a gymnosperm because…. a) polyembryony is a common features b) prothallial cell is present in the male gametophyte c) seed is naked d) stem exhibit anomalous secondary growth
Last Answer : c) seed is naked
Description : The chemicals which induce artificial polyembryony are
Last Answer : The chemicals which induce artificial polyembryony are – 2,4 D; 2,4,5, T, and NAA
Description : When embryo arises directly from the (2n) sporophytic cells like nucellus or integuments it is called as
Last Answer : When embryo arises directly from the (2n) sporophytic cells like nucellus or integuments it is called as – Adventive embryony
Description : Unlike mitosis, meiosis results in the formation of a. diploid cells. b. haploid cells. c. 2N daughter cells. d. body cells.
Last Answer : b. haploid cells.
Description : In Ulothrix/Spirogyra, reduction division (meiosis) occurs at the time of (a) gamete formation (b) zoospore formation (c) zygospore germination (d) vegetative reproduction.
Last Answer : (c) zygospore germination
Description : What is common between vegetative reproduction and apomixis? (a) Both are applicable to only dicot plants. (b) Both bypass the flowering phase. (c) Both occur round the year. (d) Both produce progeny identical to the parent.
Last Answer : (d) Both produce progeny identical to the parent
Description : What is common between vegetative reproduction and Apomixis?a)Both are applicable to only dicot plantsb)Both bypass the flowering phasec)Both occur round the yeard)Both produces progeny identical to the paren
Last Answer : Both produces progeny identical to the parent
Description : Which one of the following generates new genetic combinations leading to variation? (a) Vegetative reproduction (b) Parthenogenesis (c) Sexual reproduction (d) Nucellar polyembryony
Last Answer : (c) Sexual reproduction
Description : 4.A mature embryosac in angiosperm is formed from a megaspore mother cell by ------- cell divisions. (a) one mitosis and two meiosis, b)two mitosis and one meiosis, c)three mitosis and two meiosis d)three mitosis and one meiosis)
Last Answer : d)three mitosis and one meiosis)
Description : Example of plant in which vegetative propagation is occurred by leaves is called a) Cannabisn b) Chrysanthemum c) Cryophyllum d) Brassica
Last Answer : c) Cryophyllum
Description : Endosperm in gymnosperm is............. a) haploid b)diploid c)triploid d)tetraploid
Last Answer : a) haploid
Description : Hormogonia are the vegetative reproductive structures of (a) Chlamydomonas (b) Spirogyra (c) Oscillatoria (d) Ulothrix
Description : Vegetative propagation in mint occurs by:a) Rhizomeb) Suckerc) Runnerd) Offset
Last Answer : b) Sucker
Description : Vegetative propagation is an example of
Last Answer : Vegetative propagation is an example of – Recurrent apomixis
Description : Write short notes on leaves that help in vegetative reproduction
Last Answer : Ans: Leaves which have epiphyllous buds help in vegetative reproduction. Such leaves are called as reproductive leaves. In Bryophyllum, notches of leaf margins have epiphyllous buds which upon shedding strike ... buds arise at the leaf tip and in Begonia from the wounded regions of leaf.
Description : Name the sub-aerial stem modification seen in free floating aquatic plants. How does it help in vegetative propagation?
Last Answer : Ans: Off-set is the sub-aerial modified stem seen in free floating hydrophytes. It is brittle and has leaves and roots at its only node. When broken accidentally, it is separated from parent plant and can lead independent life.
Description : Which aerial stem modification is concerned with vegetative propagation? Give two examples.
Last Answer : Ans: Bulbils. Ex: Agave americana, Dioscoria bulbifera
Description : Who recognized the importance of floral characters in Taxonomy? Why are floral characters more useful than vegetative characters in classification?
Last Answer : Ans: Linnaeus. Floral characters show more variations and more stable than vegetative characters.
Description : Advantages of Artificial Methods of Vegetative Reproduction include a) Crops with better quality b) Crops with more yield c) Ability to produce plants with desirable qualities d) All of these
Last Answer : c) Ability to produce plants with desirable qualities
Description : Artificial methods of vegetative propagation includes a) Cloning b) grafting c) cuttings d) both b and cn
Last Answer : d) both b and cnswe
Description : Considering corms of natural vegetative propagation, buds are present at a) Front side of corm b) Backside of corm c) Top of corm d) End of corm
Last Answer : c) Top of corm
Description : Example of natural vegetative propagation does not include a) Corals b) bulbs c) corms d) rhizomes
Last Answer : a) Corals
Description : In cutting method of vegetative propagation, cuttings are mainly taken from a) Leaves of parent plant b) Roots or stems of parent plant c) Shoots of parent plant d) Buds of parent plant
Last Answer : b) Roots or stems of parent plant
Description : External agencies are not required in a) natural vegetative propagation b) sexual reproduction c) bisexual reproduction d) trisexual reproduction
Last Answer : a) natural vegetative propagation
Description : Disadvantages of natural vegetative propagation includes a) lack of dispersal mechanisms b) no fertilization is involved c) area is quickly colonized d) daughter plants can grow quickly
Last Answer : a) lack of dispersal mechanisms
Description : Seed formation without fertilisation in flowering plants involves the process of (a) somatic hybridisation (b) apomixis (c) sporulation (d) budding
Last Answer : (b) apomixis
Description : The process where, plants are propagated by seeds, but the embryo is formed by the process in which normal meiosis and syngamy has been eliminated is called
Last Answer : The process where, plants are propagated by seeds, but the embryo is formed by the process in which normal meiosis and syngamy has been eliminated is called – Agamospermy
Description : In angiosperms regarding development of microgametophyte each microspore mother cell undergoes (a) Mitosis to produce 4 microspores (b) Two successive mitosis to form 4 microspores (c) Two successive meiotic division to form 4 microspores (d) Meiosis to produce 4 haploid microspores
Description : In seed formation the inner integument remains thin and develops into: a. Testa f. Tegmen b. Aril c. Hilum
Last Answer : Tegmen
Description : $ Zygotic meiosis occurs at the time of germination of zygote. ! Zyogote may be diploid or triploid
Last Answer : $ Zygotic meiosis occurs at the time of germination of zygote. ! Zyogote may be diploid or triploid A. If ... is wrong D. If both As and R are wrong.