Biology MCQ
#1 Biology Class 12 Chapter 1 - Reproduction in Lower and Higher Plants MHTCET / NEET MCQ
Class 12 - Biology
Chapter-1 Reproduction in Lower and Higher Plants MHTCET
MCQ :-
(1) insect pollinated flowers usually possess ……… .
(a) sticky pollen with rough surface(b) large quantities of pollens(c) dry pollens with smooth surface(d) light coloured pollens
Answers
sticky pollen with rough surface
(2) in ovule, meiosis occurs in ……… .
(a) integument(b) nucellus(c) Megaspore(d) Megaspore mother cell
Ans-
Megaspore mother cell
(3) The ploidy level is NOT the same in ………
(a) I nteguments and nucellus(b) Root tip and shoot tip(c) S econdary nucleus and endosperm(d) A ntipodals and synergids
Ans-
S econdary nucleus and endosperm
(4) Which of the following types require pollination but result is genetically similar to autogamy ?
(a) Geitonogamy(b) Xenogamy(c) Apogamy(d) Cleistogamy
Ans-
Geitonogamy
(5) If diploid chromosome number in a flowering plant is 12, then which one of the following will have 6 chromosomes ?
(a) Endosperm(b) Leaf cells(c) Cotyledons(d) Synergids
Ans-
Synergids
(6) in angiosperms, endosperm is formed by/ due to ……… .
(a) free nuclear divisions of megaspore(b) polar nuclei(c) polar nuclei and male gamete(d) synergids and male gametes
Ans-
polar nuclei and male gamete
(7) point out the odd one.
(a) nucellus(b) embryo sac(c) Micropyle(d) pollen grain
Ans-
P ollen grain
(8) in grafting, the rooted plant is used as a ……… .
(a) scion(b) stock(c) stem(d) root
Ans-
stock
(9) the method of propagation by root cutting is practised in ……… .
(a) Rose(b) Bougainvillea(c) Sansevieria(d) Blackberry
Ans-
Blackberry
(10) Monothecous anther has ……… pollen sacs.
(a) single(b) two(c) three(d) four
Ans-
two
(11) In wall of mature anther, ……… shows fibrous thickenings.
(a) epidermis(b) endothecium(c) middle layer(d) tapetum
Ans-
endothecium
(12) Intine consists of ……… .
(a) cellulose and pectin(b) cellulose and chitin(c) cellulose and starch(d) cellulose and sporopollenin
Ans-
cellulose and pectin
(13) The stalk of the ovule that attaches to placenta is ………. which is attached at ……… to the body of ovule.
(a) chalaza, hilum(b) hilum, funiculus(c) funiculus, hilum(d) micropyle, hilum
Ans-
funiculus, hilum
(14) ……… is multicellular structure embedded in nucellus.
(a) Micropyle(b) Chalaza(c) Embryo sac(d) Endothecium
Ans-
mbryo sac
(15) The transfer of pollen grains from the anther to the stigma is called ………. .
(a) pollination(b) fertilization(c) transpiration(d) viability
Ans-
pollination
(16) This condition is not favourable for autogamy in flowers.
(a) Bisexuality(b) Homogamy(c) Cleistogamy(d) Herkogamy
Ans-
Herkogamy
(17) From the following, mechanism of pollination by abiotic agent is ………. .
(a) Ornithophily(b) Anemophily(c) Entomophily(d) Chiropterophily
Ans-
Anemophily
(18) In which type of flowers, the pollen grains are ribbon like without exine ?
(a) Anemophilous(b) Epihydrophilous(c) Hypohydrophilous(d) Entomophilous
Ans-
Hypohydrophilous
(19) Which flower exhibits turn pipe mechanism of pollination ?
(a) Salvia(b) Zostera(c) Cestrum(d) Callistemon
Ans-
Salvia
(20) The phenomenon of pollen grains of other flowers germinate rapidly on stigma than the pollen grains of same flower is ………. .
(a) Protoandry(b) Protogyny(c) Prepotency(d) Pollination
Ans-
Prepotency
(21) Inhibition of germination of pollen on stigma of same flower is ………. .
(a) self-sterility(b) self-pollination(c) self compatibility(d) selfing
Ans-
self-sterility
(22) The stigma provides ……… for germination of pollen on it.
(a) oxygen(b) water(c) pectin(d) malic acid
Ans-
water
(23) For successful artificial hybridization, these processes are essential.
(a) D isbudding and Bagging(b) Budding and Bagging(c) E masculation and Budding(d) E masculation and Bagging
Ans-
E masculation and Bagging
(24) Continued self-pollination results in …… .
(a) Hybrid vigour(b) G enetic variability at greater extent(c) I nbreeding depression(d) I ntroduction of desired traits
Ans-
I nbreeding depression
(25) Heterostyly : Primula flowers : :Herkogamy : ?
(a) Gloriosa(b) Calotropis(c) Thea(d) Salvia
Ans-
Calotropis
(26) The substance having key role in recognition and compatibility of pollen in pollen – pistil interaction is ……… .
(a) special proteins(b) special lipids(c) pollenkitt(d) sucrose
Ans-
special proteins
(27) This is NOT a type but variation in endosperm.
(a) Cellular(b) Helobial(c) Nuclear(d) Mosaic
Ans-
Mosaic
(28) In monocot embryo, the single cotyledon is ……… shaped and it is called ……… .
(a) oval, scutellum(b) shield, scutellum(c) angle, coleoptile(d) angle, coleorhiza
Ans-
shield, scutellum
(29) Endospermic seed : Maize : :Non-endospermic seed : ?
(a) Castor(b) Coconut(c) Wheat(d) Bean
Ans-
Bean
(30) The integuments of fertilized ovule form the ……… .
(a) seed(b) seed coat(c) hilum(d) perisperm
Ans-
seed coat
(31) When diploid sporophytic cell forms diploid gametophyte without meiosis, it is phenomenon of ……… .
(a) apogamy(b) apocarpy(c) apospory(d) apoptosis
Ans-
apospory
(32) Which chemical substance is responsible for fruit development by Parthenocarpy ?
(a) Malic acid(b) Sucrose(c) Boric acid(d) I ndole acetic acid
Ans-
I ndole acetic acid
(33) Citrus seeds : P olyembryony : :Papaya fruits : ?
(a) Diplospory(b) Apogamy(c) Parthenocarpy(d) Apospory
Ans-
Parthenocarpy
(34) Who discovered the phenomenon of double fertilization ?
(a) Noll(b) Maheshwari(c) Leeuwenhock(d) Nawaschin
Ans-
Nawaschin
(35) When embryo development takes place the first cell of the suspensor which is towards micropylar end functions as ………. .
(a) hypophysis(b) haustorium(c) scutellum(d) plumule
Ans-
haustorium
(36) Point out the odd one.
(a) Coleoptile(b) Coleorhiza(c) Scutellum(d) Perisperm
Ans-
perisperm
(37) Select the plant having both chasmogamous and cleistogamous flowers.
(a) Viola(b) Primula(c) Thea(d) Fritillaria
Ans-
Viola
(38) Identify the mismatched pair.
(a) C ellular endosperm – Balsam(b) N uclear endosperm – Wheat(c) Helobial endosperm – Asphodelus(d) Mosaic endosperm – Coconut
Ans-
Mosaic endosperm – Coconut
(39) Up to which stage embryo development is
similar in dicots and monocots?
(a) Proembryo(b) Quadrant(c) Octant(d) Heart-shaped
Ans-
Octant
(40) The cross pollination within the same species is also called ......... .
(a) hybridization(b) xenogamy(c) allogamy(d) autogamy
Ans-
xenogamy
(41) In a recently fertilized ovule, the haploid,diploid and triploid conditions are respectively seen in ......... .
(a) endosperm, nucellus, egg(b) egg, nucellus, endosperm(c) antipodals, oospore, primary endosperm nucleus(d) polar nuclei, secondary nucleus, endosperm
Ans-
antipodals, oospore, primary endosperm nucleus
(42) In sunflower, self-pollination is avoided by .......... .
(a) protogyny(b) unisexuality(c) self-sterility(d) protandry
Ans-
protandry
(43) A versatile anther is an adaptation for .........type of pollination.
(a) anemophilous(b) entomophilous(c) hydrophilous(d) ornithophilous
Ans-
anemophilous
(44) The endosperm cells in an angiospermic plant has 18 chromosomes, the number of chromosomes in its root cells will be ....... .
(a) 12(b) 6(c) 18(d) 24
Ans-
12
(45) In porogamy, the pollen tube enters into the ovule through ......... .
(a) micropyle(b) integuments(c) chalaza(d) funicle
Ans-
micropyle
(46) Which of the following is not floral adaptation for entomophily ?
(a) Large flowers(b) Bright coloured flowers(c) Sweet scented flowers(d) Small inconspicuous flowers
Ans-
small inconspicuous flower
(47) Pollination through water is called ......... .
(a) zoophily(b) hydrophily(c) anemophily(d) entomophily
Ans-
hydrophily
(48) The types of pollination exhibited by Vallisneria and Zea mays respectively aren......... .
(a) anemophily and hydrophily(b) entomophily and hydrophily(c) hydrophily and anemophily(d) hydrophily and entomophily
Ans-
hydrophily and anemophily
(49) The union of male gamete with the female gamete is called ......... .
(a) autogamy(b) allogamy(c) fertilization(d) pollination
Ans-
fertilization
(50) The secondary nucleus is formed by the fusion of ......... .
(a) two polar nuclei(b) three nuclei(c) two synergids(d) two antipodal cells
Ans-
two polar nuclei
(51) A group of three cells situated at the base of the embryo sac are called ......... .
(a) tube(b) generative(c) synergid(d) antipodal
Ans-
antipodal
(52) The female gametophyte in angiosperms is a ......... nucleated structure.
(a) 3(b) 4(c) 5(d) 8
Ans-
8
(53) In artificial hybridization, pollen grains are pollinated by ......... .
(a) wind(b) insect(c) birds(d) hand
Ans-
hand
(54) Which of the following does not occur in the embryo sac of angiosperms ?
(a) egg apparatus(b) secondary nucleus(c) antipodal cells(d) raphe
Ans-
raphe
(55) To produce 500 pollen grains, how many microspore mother cells are required ?
(a) 500(b) 125(c) 250(d) 1000
Ans-
125
(56) How many meiotic divisions are required for the formation of 100 seeds ?
(a) 25(b) 50(c) 100(d) 125
Ans-
50
(57) During fertilization, male gametes are carried by pollen tube. This is called ......... .
(a) syngamy(b) siphonogamy(c) mesogamy(d) polygamy
Ans-
siphonogamy
(58) In bisexual flowers, maturation of gynoecium before androecium is known as ......... .
(a) protandry(b) protogyny(c) gynandry(d) dicliny
Ans-
protogyny
(59) ......... is formed in angiosperms by triple fusion.
(a) Testa(b) Integument(c) Endosperm(d) Suspensor
Ans-
Endosperm
(60) The minimum number of meiotic divisions required to produce 120 viable seeds in pea plant is ......... .
(a) 150(b) 60(c) 120(d) 90
Ans-
150
(61) Ornithophily is effected by ......... .
(a) snails(b) insects(c) bats(d) birds
Ans-
birds
(62) Synergids are ......... .
(a) haploid(b) triploid(c) diploid(d) tetraploid
Ans-
haploid
(63) Egg apparatus consists of ......... .
(a) egg and antipodals(b) egg and polar nuclei(c) egg and synergids(d) egg and secondary nucleus
Ans-
egg and synergids
(64) Embryo sac is ......... .
(a) microgametophyte(b) microsporangium(c) megagametophyte(d) megasporangium
Ans-
megagametophyte
(65) If the number of chromosomes in an endosperm cell is 27, what will be the chromosome number in the definitive nucleus ?
(a) 9(b) 18(c) 27(d) 36
Ans-
18
(66) How many meiotic divisions will be needed to produce 44 female gametophytes in angiosperms ?
(a) 11(b) 22(c) 44(d) 66
Ans-
44
(67) Endosperm of angiosperm is ......... .
(a) haploid(b) diploid(c) triploid(d) tetraploid
Ans-
triploid
