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NEET Biology MCQ
Sexual Reproduction In Flowering Plants Mcq
Quiz 9
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Q.1
on 211 Which if the following has the least pollen viability?
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a) Cereals like wheat and rice
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b) Members of Rosaceae
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c) Members of Leguminosae
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d) Members of Solanaceae
Explanation
Answer:(a)
Q.2
on 212 In a fully organised polygonum type of embryo sac, what is the ratio of number of haploid to diploid to triploid nuclei?
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a) 6: 1: 0
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b) 6: 0: 1
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c) 3: 1: 3
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d) 3: 2: 2
Explanation
A fully organised Polygonum type of embryo sac is a 7-celled 8-nucleate structure. The cells of egg apparatus and antipodal cells are haploid whereas the central cell is diploid, ie, contains two polar nuclei. Triploid endosperm is formed after triple fusion, ie, fusion of second male gamete with polar nuclei. Egg aparatus consists of egg cell and two synergids and antipodal consists of 3 haploid cells. Therefore, haploid are 6, diplid are 1 and triploid are 0. Thus ratio is 6:1:0 Answer:(a)
Q.3
on 213 There are 10 flowers in one individual plant of Crotalaria. In each microsporangium of every stamen of all the flowers, there are 300 microspore mother cells. How many pollen grains are formed from that plant?
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a) 48,000
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b) 24,000
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c) 10,000
0%
d) 4,000
Explanation
Answer:(a)
Q.4
on 214 In Nutmeg, aril is developed from:
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a) Integument
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b) Hilum
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c) Raphae
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d) Funicle
Explanation
Answer:(d)
Q.5
on 215 Essential temperature for the growth of pollen tube:
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a) 15 – 20 ºC
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b) 15 – 25 ºC
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c) 20 - 30ºC
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d) 25 – 40 ºC
Explanation
Answer:(c)
Q.6
on 216 Monosporic/polygonum type of embryo sac was discovered by:
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a) Amici
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b) Panchanan Maheshwari
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c) Strasburger
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d) Nawaschin
Explanation
Answer:(c)
Q.7
on 217 The embryo sac is produced from
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a) Microscope
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b) Zygote
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c) Egg cell
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d) Megaspore
Explanation
Answer:(d)
Q.8
on 218 Ovule is attached to the placenta by
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a) pedical
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b) Hilum
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c) Funicle
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d) petiole
Explanation
Answer:(c)
Q.9
on 219 An anther is also called
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a) Sporangium
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b) Megasporangium
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c) Microsporangium
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d) Stamen
Explanation
Answer:(c)
Q.10
on 220 Two male gametes are
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a) produced before pollination
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b) Haploid
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c) Diploid
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d) At the time of pollination
Explanation
Answer:(b)
Q.11
on 221 Style is ... ..
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a) a is delicate hollow tube
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b) a tough hollow tube
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c) a delicate filament
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d) called pollen tube
Explanation
Answer:(c)
Q.12
on 222 In the flowering plants, male and female gametes both are
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a) Motile
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b) Non-motile
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c) Diploid
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d) Very large
Explanation
Answer:(b)
Q.13
on 223 A sterile region present between stigma and ovary is called
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a) Pollen tube
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b) Style
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c) Filament
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d) Suspensor
Explanation
Answer:(b)
Q.14
on 224 The pollen tube usually enters the female gametophyte
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a) through one of the synergids
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b) by directly penetrating the egg
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c) between one synergid and central cell
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d) by knocking off the antipodal cell
Explanation
Answer:(a)
Q.15
on 225 A proximal sterile part of the stamen is called
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a) Style
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b) Connective
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c) Anther
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d) Filament
Explanation
Answer:(d)
Q.16
on 226 Which one of the following floats in the cytoplasm of the vegetative cell ?
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a) Male gamete
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b) Generatic cell
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c) Female gamete
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d) Microspore
Explanation
Answer:(b)
Q.17
on 227 The intine of a pollen grain is made up of
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a) Lignin and suberin
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b) Pectin and cellulose
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c) Lignin and Hemicellulose
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d) Pectin and callose
Explanation
Answer:(b)
Q.18
on 228 Suspensor is produced from
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a) Apical cell
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b) Small upper basal cell
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c) large lower basal cell
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d) Hypophysis
Explanation
Answer:(b)
Q.19
on 229 Cross pollination is normally
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a) not beneficial
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b) harmful
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c) more beneficial
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d) rarely seen
Explanation
Answer:(c)
Q.20
on 230 Pollen tube, entering in embryo sac has
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a) 3 male gametes
0%
b) 1 male gametes
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c) 2 male gametes
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d) 4 male gametes
Explanation
Answer:(c)
Q.21
on 231 A microspore is a
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a) Male gamate
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b) First cell of male gametophyte
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c) Last cell of male gametophyte
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d) Diploid cell
Explanation
Answer:(b)
Q.22
on 232 Identify the correct statement regarding Commelina:
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a) It is strictly unisexual
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b) It possesses upper chasmogamous and lower cleistogamous flowers
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c) It possesses lower chasmogamous and upper cleistogamous flowers
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d) The chasmogamous flowers are geocarpic with respect to cleistogamous flowers
Explanation
Answer:(b)
Q.23
on 233 Assertion: Multicarpellary syncarpous pistil is present in Papaver. Reason: Pistil is formed of only one carpel which is fused.
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a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion
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b) Both Assertion and Reason are true but Reason is NOT the correct explanation of Assertion
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c) Assertion is true but Reason is false
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d) Both Assertion and Reason are false
Explanation
Answer:(c)
Q.24
on 234 Which scientist proposed anther is male sex organ and pistil is the female sex organ?
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a) Camerarius
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b) Nawaschin
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c) Strasburger
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d) P. Maheshwari
Explanation
Answer:(a)
Q.25
on 235 In a type of apomixis known as adventive embryony, embryos develop directly from the:
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a) Zygote
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b) Nucellus or integuments
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c) Synergids or antipodals in an embryo sac
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d) Accessory embryo sac in the ovule
Explanation
Answer:(b)
Q.26
on 236 Double fertilization involves:
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a) fertilization of the egg by two male gametes
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b) fertilization of two eggs in the same embryo sac by two sperms brought by one pollen tube
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c) fertilization of the egg and the central cell by two sperms brought by different pollen tubes
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d) fertilization of the egg and the central cell by two sperms brought by the same pollen tube
Explanation
Answer:(d)
Q.27
on 237 Consider the following features seen in a plant: I. Male and female reproductive organs are generally found in separate flowers. II. The male flowers having a number of long filaments terminating in exposed stamens. III. The female flowers having long, feather-like stigmas. The flowers of this plant would most likely be pollinated by:
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a) Wind
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b) Water
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c) Bees
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d) Birds
Explanation
Answer:(a)
Q.28
on 238 The anther wall between epidermis and middle layers is:
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a) Endothecium
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b) Tapetum
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c) Archesporium
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d) Parietal layer
Explanation
Answer:(a)
Q.29
on 239 If pollination takes place between the two flowers of same plant, it is known as:
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a) Xenogamy
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b) Cleistogamy
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c) Geitonogamy
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d) Herkogamy
Explanation
Answer:(c)
Q.30
on 240 Which of the following is wrong?
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a) The viability of pollen grains of rosaceae and solanaceae is about one month
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b) Aristolochia plant has all five types of pollen tetrads
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c) Male gametes are formed by meiotic division through generative cell
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d) Development of male gametophyte is precocious or in situ in angiosperms
Explanation
Answer:(c)
Q.31
on 241 Intine of pollen is composed of:
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c) Pectin and cellulose
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a) Cellulose
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b) Sporopollenin and pectin
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d) Sporopollenin, cellulose and pectin
Explanation
Answer:(c)
Q.32
on 242 Select the incorrect statement:
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a) Cleistogamy do not favours inbreeding depressions
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b) Commelina and Viola bears both cleistogamous and chasmogamous flowers
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c) Cleistogamous flowers can produce seeds even in the absence of pollinators
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d) Cleistogamy is disadvantageous in respect to no further development of variations in offsprings
Explanation
Answer:(a)
Q.33
on 243 Cleistogamous flowers are:
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a) Strictly unisexual
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b) Strictly bisexual and geocarpic
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c) Monoecious and geocarpic
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d) Strictly dioecious, bisexual and geocarpic
Explanation
Answer:(b)
Q.34
on 244 . Aril is:
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a) Modified second integument
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b) Modified third integument
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c) Modified funicle
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d) Modified nucellus
Explanation
Answer:(b)
Q.35
on 245 Which among the following statements is wrong about Sporogenesis in the anther and ovule?
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a) Archesporium in an anther is hypodermal in position and many celled
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b) Archesporium initial undergoes mitosis before the meiosis
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c) One ovary always possesses a single megasporangium on the placenta
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d) One ovule can have maximum four megaspores when one or more than one can develop into a female gametophyte
Explanation
Answer:(c)
Q.36
on 246 If the ovary of a flower possess basal placentation, what will be the number of meiosis in that ovary?
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a) One
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b) Four
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c) Many
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d) Numerous
Explanation
Answer:(a)
Q.37
on 247 The number of meiosis in an anther, anther locule, ovary and ovule are respectively:
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a) Many, one, many, one
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b) Many, Many, One – many, one
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c) Many, one, One – Many, many
0%
d) One – many, many, one, one – many
Explanation
Answer:(b)
Q.38
on 248 Which among the following sentence is not correct about the anther wall layers?
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a) Cells of the tapetum possess dense cytoplasm and generally have more than one nucleus
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b) The endothecium lies inner to epidermis and have hydrophilic thickenings on their radial walls
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c) The middle layers are in between epidermis and endothecium
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d) A typical microsporangium is surrounded by four wall layers
Explanation
Answer:(c)
Q.39
on 249 When a diploid female parent is crossed with a Tetraploid male plant, the ploidy of the endosperm cells in the resulting seed is:
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a) Pentaploidy
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b) Diploidy
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c) Triploidy
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d) Tetraploidy
Explanation
Answer:(d)
Q.40
on 250 Read the following statements describing the type of cell division happening during the different embryological events in a flowering plant. Identify the correct statements: (i) During Sporogenesis, there is mitosis and meiosis. (ii) During gametogenesis, there is mitosis only. (iii) During embryogenesis, there is meiosis followed by mitosis. (iv) During gametogenesis, there is meiosis only. (v) During Sporogenesis, there is mitosis only.
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a) (i) and (ii)
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b) (ii), (iv) and (v)
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c) (iii), (iv) and (v)
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d) (iv) and (v)
Explanation
Answer:(a)
Q.41
on 251 Most advanced and common tapetum is: (i) Amoeboid tapetum. (ii) Invasive tapetum. (iii) Periplasmodial tapetum. (iv) Glandular tapetum. (v) Secretory tapetum.
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a) Both (ii) and (iii)
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b) Both (iv) and (v)
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c) (i) only
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d) (iii) only
Explanation
Answer:(b)
Q.42
on 261 Out of megaspore tetrad, the functional megaspore is
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a) Any megaspore
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b) middle megaspore
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c) Micropylar megaspore
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d) Chalazal megaspore
Explanation
Megaspore mother cell undergoes meiosis to form four haploid megaspores which are arranged in a linear tetrad. Out of these four megaspores, only one remains functional that develops into embryo sac or the female gametophyte and the rest three degenerate. The megaspore that remains functional can either be micropylar or chalazal depending upon the species. For example, in Polygonum, chalazal megaspore is functional while in Oenothera, micropylar megaspore is functional. Since Polygonum type embryo sac is the most common type of embryo sac found in Angiosperms, the functional Megaspore is generally the chalazal one. So, the correct answer is "d". Answer:(d)
Q.43
on 262 Tapetum provides
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a) protection to embryo
0%
b) Nourishment to pollen grains
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c) Nourishment to embryo
0%
d) Protection to endosperm
Explanation
Answer:(b)
Q.44
on 263 In triple fusion, how many male gamete participate ?
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a) 1
0%
b) 2
0%
c) 3
0%
d) 4
Explanation
Answer:(a)
Q.45
on 264 The pedicel of the female flower coils after pollination in
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a) Lotus
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b) Hydrilla
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c) Vallisneria
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d) Trapa
Explanation
Answer:(c)
Q.46
on 265 The asexual production of seed is called
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a) Fragmentation
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b) Apomixis
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c) Self-fertilization
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d) Dormancy
Explanation
Answer:(b)
Q.47
on 266 Scatelum is
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a) an endosperm
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b) a seed coat
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c) an embryo
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d) a cotyledon
Explanation
Answer:(d)
Q.48
on 267 . Endothecium in anther helps in
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a) Dehiscence of anther
0%
b) Nutrition to pollen
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c) Germination of pollen
0%
d) Formation of male gamete
Explanation
Answer:(a)
Q.49
on 268 The uppermost and largest cell of the suspensor which remains in contact with apical cells is called
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a) Hypocotyl
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b) Basal cell
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c) Hypophysis
0%
d) Terminal cell
Explanation
Answer:(c)
Q.50
on 269 The formation of zygote without the act of syngamy is called
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a) Poly embryony
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b) Parthenogenesis
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c) Budding
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d) Apospory
Explanation
Answer:(b)
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