Plants like Elm (Ulmus), Dandelion (Taraxacum) and members of Rose Family vegetatively reproduce by
(1) Rhizome
(2) Sucker
(3) Stolon
(4) Corm
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Water hyacinth is one of the most invasive weeds primarily because:
(1) It gets adapted to any fresh water body easily
(2) It produces secondary metabolites against herbivores
(3) It can propagate vegetatively at a phenomenal rate
(4) It is predated upon by a large number of organisms
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When both male and female flowers are present on the same plant, then plant is said to be:
(1) Bisexual
(2) Monoecious
(3) Unisexual
(4) Dioecious
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The most critical event in sexual reproduction is:
(1) Gametogenesis
(2) Gamete transfer
(3) Fertilization
(4) Embryogenesis
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With respect to organisms exhibiting internal fertilization, organisms exhibiting external fertilization show:
(1) More variations
(2) Great synchrony between sexes
(3) Large female size than males
(4) Less vulnerability to predation
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In animals exhibiting internal fertilization:
(1) There is high synchrony between the two sexes
(2) The chances of desiccation of the embryo is high
(3) The male gamete is motile
(4) Vulnerability to predators is increased
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