60 MTBIOLOGY TODAY | JULY ‘15- In angiosperms, functional megaspore develops into
(a) embryo sac (b) ovule
(c) endosperm (d) pollen sac. - Pollination by the agency of snails is known as
(a) ornithophily (b) chiropterophily
(c) entomophily (d) malacophily. - One advantage of cleistogamy is
(a) it leads to greater genetic diversity
(b) seed dispersal is more efficient and widespread
(c) seed set is not dependent on pollinators
(d) each visit of a pollinator results in transfer of hundreds
of pollen grains.- Chiropterophily means
(a) pollination by snails (b) pollination by bats
(c) pollination by wind (d) pollination by insects.- Wind pollinated flowers are
(a) small, brightly coloured, producing few pollen grains
(b) small, producing large number of dry pollen grains
(c) large, producing abundant nectar and pollen grains
(d) small, producing nectar and dry pollen grains.- The type of pollination involving transfer of pollen grains
from anther to the stigma of the same flower is known as
(a) geitonogamy (b) xenogamy
(c) autogamy (d) apogamy. - The type of pollination that brings genetically different types
of pollen grain to the stigma of a plant is called
(a) xenogamy (b) geitonogamy
(c) chasmogamy (d) autogamy. - Maize and grasses are generally pollinated by
(a) bees (b) butterflies
(c) birds (d) wind. - Match the items in Column I with those in Column II and
select the correct answer from the codes given below.
Column I Column II- Funicle A. Small opening of ovule
- Integuments B. Stalk of ovule
- Chalaza C. Protective envelopes of
ovule - Hilum D. Junction part of ovule and
stalk - Micropyle E. Basal part of the ovule
(a) 1-B; 2-C; 3-E; 4-D; 5-A
(b) 1-A; 2-C; 3-B; 4-D; 5-E
(c) 1-B; 2-C; 3-A; 4-D; 5-E
(d) 1-B; 2-D; 3-E; 4-A; 5-C - Even in absence of pollinating agents, seed-setting is
assured in
(a) Commellina (b) Zostera
(c) Salvia (d) fig. - Which one of the following pairs of plant structures has
haploid number of chromosomes?
(a) Nucellus and antipodal cells
(b) Egg nucleus and secondary nucleus
(c) Megaspore mother cell and antipodal cells
(d) Egg cell and antipodal cells - Study the given figure of an embryo sac and select the
correct option regarding A, B, C and D.
(a) Cells labelled as ‘A’ are ususally present at micropylar
end.
(b) Cells labelled as ‘C’ and ‘D’ are usually present at
chalazal end.
(c) ‘B’ represents polar nuclei which may fuse to form a
diploid secondary nucleus.
(d) Cells labelled as ‘A’ are diploid cells.- Select the incorrect statement regarding sexual reproduction
in flowering plants.
(a) Pollen grain is the first cell of male gametophyte.
(b) An ovule represents integumented megasporangium.
(c) Nucellus of the ovule is a diploid structure.
(d) Stamen is equivalent to megasporophyll. - Microsporogenesis is the
(a) formation of megaspore
(b) formation of pollen grain
(c) development of male gametophyte
(d) development of female gametophyte.
Answer Key
- (a) 2. (c) 3. (b) 4. (b) 5. (a)
- (a) 7. (a) 8. (b) 9. (a) 10. (c)
- (c) 12. (c) 13. (b) 14. (b) 15. (c)
- (c) 17. (a) 18. (d) 19. (c) 20. (b)
- (b) 22. (c) 23. (a) 24. (d) 25. (a)
- (a) 27. (d) 28. (c) 29. (d) 30. (b)