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Earn 100
Which group of plants is known as flowering plants? Also, why are they named so?
Important Questions on Plant Kingdom
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The plant parts which consist of two generations one within the other:
(a) Pollen grains inside the anther
(b) Germinated pollen grain with two male gametes
(c) Seed inside the fruit
(d) Embryo sac inside the ovule
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(i) The megaspores and microspores germinate and give rise to female and male gametophytes respectively
(ii) The female gametophytes in these plants are retained on the parent sporophytes for variable periods
(iii) The development of the zygotes into young embryos takes place within the female gametophytes
(iv) This event is a precursor to the seed habit considered as an important step in the evolution
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Indian Ginseng
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In which of the following books, characters of evolutionary importance were not considered while classifying plants?
A) Species plantarum
B) Families of flowering plants
C) Genera plantarum
D) Die Naturlichen Pflanzenfamilien
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Cinchona
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Write the scientific name and the utility of the following plant:
Teak
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Sissoo
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Multicellular, much reduced and dependent gametophyte
Siphonogamous fertilization
Fusion of male gametes with egg cell and secondary nucleus
Development of ovule into seed
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Equal distribution of water and air in the habitat
Adaptation to excessive water and extensive dryness
Do not show adaptation to extensive dryness
Grow in excessive water and extensive dry areas
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Reason: Sperms are not dependent on water for fertilization.
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Reason: Angiosperm and Gymnosperms both form triploid endosperm.
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