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Earn 100
Cotyledons are:
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Important Questions on Plant Kingdom
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A) The female sex organs of Angiosperms are called strobilus.
B) The fusion of motile male gamete with non-motile egg is called zooidogamy.
C) Some algae are in association with animals.
D) Archegonium is flank shaped male sex organ with single cell.
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Match the following lists.
| List I | List II |
| A) Submerged rooted hydrophyte | I) Hydrilla |
| B) Rooted hydrophyte with floating leaves | II) Salvinia |
| C) Free floating hydrophyte | III) Victoria regia |
| D) Submerged suspended hydrophyte | IV) Limnophila |
| V) Vallisneria |
The correct match is:
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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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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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Assertion (A): Petro plants yield bio-diesel.
Reason (R): Jatropha is rich in hydrocarbons.
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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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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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Reason: Triple fusion occurs in double fertilization.
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Reason: Two cotyledons are present in the dicot plants.
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Reason: Angiosperms lack archegonia.
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Reason: Microsporophyll and megasporophyll forms microspore and megaspore respectively.
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Reason: Angiosperm and Gymnosperms both form triploid endosperm.
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Reason: Sperms are not dependent on water for fertilization.
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