Multiple Choice QuestionsDuring replication of DNA, Okazaki fragments are formed in the direction of
3' ➔ 5'
5' ➔ 3'
5'➔5'
3' ➔ 3'
If you want to develop hybrid seeds within a bisexual flower, the following part needs to be removed from the same flower
stigma
ovary
anther
oviduct
Xenogamy is essentially a type of
cleistogamy
allogamy
autogamy
homogamy
B.
allogamy
Xenogamy is true cross-pollination, i.e., allogamy which involves the transfer of pollen grains from the anther of one plant to the stigma of another, genetically dissimilar plant.
Cleistogamy is a type of automatic self-pollination of certain plants that can propagate by using non-opening, self-pollinating flowers.
Autogamy or self-fertilization, is the fusion of two gametes that come from one individual. It is predominantly observed in the form of self-pollination, a reproductive mechanism employed by many flowering plants.
Homogamy is a state in which the flowers of a plant are all of one type either hermaphrodite or of the same sex.
Which one of the following statement is correct?
Hard outer layer of pollen is called intine
Sporogenous tissue is haploid
Endothecium produces the microspores
Tapetum nourishes the developing pollen
Advantage of cleistogamy is
higher genetic variability
more vigorous offspring
no dependence on pollinators
vivipary
Monoecious plant of Chara shows occurrence of
antheridiophore and archegoniophore on the same plant
stamen and carpel on the same plant
upper antheridium and lower oogonium on the same plant
upper oogonium and lower antheridium on the same plant
Perisperm differs from endosperm in
being a haploid tissue
having no reserve food
being a diploid tissue
its formation by fusion of secondary nucleus with several sperms
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