Reproduction Growth & Development MCQs Part VI

1) Which of the following plant cells will show totipotency?
a) Sieve tubes
b) Xylem vessels
c) Meristem
d) Cork cells

2) Virus free plants can be obtained by
a) Antibiotic treatment
b) Bordeaux mixture
c) Root tip culture
d) Shoot tip culture

3) Which one may cause self pollination?
a) Dicliny
b) Herkogamy
c) Cleistogamy
d) Dichogamy

4) Cleistogamous flowers are
a) Male flowers which never open
b) Female flowers which never open
c) Bisexual flowers which never open
d) Open bisexual flowers which perform self pollination in bud condition

5) Maturation of stigma and anthers at different times in the same flower is
a) Heterostyly
b) Dichogamy
c) Dicliny
d) Herkogamy

6) Translator mechanism occurs in
a) Ocimum
b) Calotropis
c) Yucca
d) Ocimum

7) Nontransfer of pollen from anther to stigma of the same flower due to a mechanical barrier is
a) Dichogamy
b) Herkogamy
c) Heterostyle
d) Cleistogamy

8) Which is the larger nucleus in a pollen grain?
a) Generative nucleus
b) Vegetative nucleus
c) Male gamete nucleus
d) Prothallial nucleus

9) The innermost wall layer of a pollen sac is
a) Protection
b) Nutrition
c) Dehiscence
d) Mechanical strength

10) Ubisch bodies are connected with the development of
a) Embryo sac
b) Embryo
c) Endosperm
d) Pollen grains

11) Generative cell was destroyed by laser but a normal pollen tube was still formed because
a) Vegetative cell is not damaged
b) Contents of killed generative cell stimulate pollen growth
c) Laser beam stimulates growth of pollen tube
d) The region of emergency of pollen tube is not harmed.

12) Anthesis means
a) Growth of pollen tube inside the carpel
b) Dehiscence of anthers
c) Opening of floral bud
d) Emergence of anthers

13) The ovule is technically equivalent to the
a) Megasporangium
b) Megaspore
c) Megagametangium
d) Microgametangium

14) Double fertilization and triple fusion were discovered by
a) Hofmeister
b) Nawaschin and Guignard
c) Leeuwenhoek
d) Strsburger

15) The number of chromosomes in a root cell is 14. What will be the number in endosperm?
a) 18
b) 36
c) 12
d) 24

16) Roots are used in vegetative propagation of
a) Ginger
b) Chrysanthemum
c) Sweet Potato
d) Potato

17) One application of embryo culture is in
a) Clonal propagation
b) Overcoming hybridisation barrier
c) Production of alkaloids
d) Formation of somaclonal variations

18) The chief pollinators of agricultural crops are
a) Butterflies
b) Bees
c) Moths
d) Beetles

19) One of the most resistant biological materials is
a) Lignin
b) Hemicellulose
c) Lignocellulose
d) Sporopollenin

20) A tetrad of megaspores is generally
a) Tetrahedral
b) Linear
c) Decussate
d) Isobilateral

21) Nawaschin (1898) discovered double fertilization in
a) Lilium and Fritillaria
b) Brassica and Iberis
c) Papaya and Pea
d) Mango and Sugarcane

22) A unique phenomenon observed in the embryo sac of angiosperms is
a) Fusion of gametes
b) Double fusion
c) Triple fusion
d) Triple fusion and double fertilization

23) Tapetum occurs in
a) Anther wall
b) Ovary wall
c) Male gametophyte
d) Female gametophyte

24) The route used by the pollen tube to enter the ovule is the
a) Integument
b) Micropyle
c) Chalaza
d) Any of the above

25) Heaping up earth around the stem base in Potato is meant to
a) Prevent exposure of the roots
b) Provide extra support to the delicate stem
c) Induce the development of more auxiliary shoots
d) Make more water available

26) In a grafted plant, the stock has 48 chromosomes while the scion has 24 chromosomes. The chromosome number for the root cells and eggs are respectively
a) 48 and 24
b) 24 and 24
c) 24 and 12
d) 48 and 12

27) Axenic culture is
a) Culture of tissue
b) Culture of genes
c) Pure culture without contamination
d) Pure culture of microbe without any external nutrient.

28) Anemophily occurs in
a) Grasses
b) Legumes
c) Euphorbia
d) Annona

29) Gloriosa superba exhibits
a) Heterostyly
b) Self sterility
c) Herkogamy
d) Cleistogamy

30) Potatoes are cultivated by
a) Seeds
b) Foliar buds
c) Buds on tubers
d) Cutting of roots

31) Callus is the
a) Material that heals injury in phloem
b) Undifferentiated mass of cells
c) Tissue developed in the region of wound
d) All the above

32) In 82% of angiosperm families, the ovule is
a) Anatropous
b) Orthotropous
c) Amphitropous
d) Circinotropous

33) The entry of the pollen tube through the chalazal end is
a) Syngamy
b) Porogamy
c) Mesogamy
d) Basigamy

34) In a type of apomixis known as adventitive embryony, embryos develop directly from the
a) Nucellus or integument
b) Zygote
c) Synergids or antipodals of embryo sac
d) Accessory embryo sacs in the ovule

35) What would be the number of chromosomes in the cells of the aleurone layer in plant species that has 8 chromosomes in its synergids?
a) 8
b) 16
c) 24
d) 32

36) Parthenocarpic fruits are produced by
a) Treating plants with phenyl mercuric acetate
b) Treating plants with low concentrations of gibberellic acid and auxin
c) Removing androecium of flowers before release of pollen auxin
d) Raising plants from vernalised seeds.

37) Identify the wrong statement regarding post fertilisation development
a) The ovary wall develops into the pericarp
b) The outer integument of the ovule develops into the tegmen
c) The fusion nucleus (triple nucleus) develops into the endosperm
d) The ovule develops into the seed

Answers

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