MEDIUM
Earn 100
Endosperm of gymnosperm is ontogenetically similar to angiospermic
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Important Questions on Plant Kingdom
MEDIUM
Xylem and phloem are main conducting elements.
Pollen grains are carried by wind.
Transfer of pollen is direct.
Ovules develop into seeds after fertilisation.
EASY
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
EASY
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
EASY
(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
EASY
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:
MEDIUM
A) Meiosis has to occur if a diploid body has to produce gametes
B) In Cladophora it is not possible to categorise the male and female gametes
C) Organisms exhibiting external fertilization show greater synchrony between sexes
D) In Wolffia isogametes can be seen
EASY
EASY
MEDIUM
EASY
Write the scientific name and the utility of the following plant:
Teak
EASY
Assertion (A): Petro plants yield bio-diesel.
Reason (R): Jatropha is rich in hydrocarbons.
EASY
HARD
EASY
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.
EASY
MEDIUM
MEDIUM
EASY
EASY
Multicellular, much reduced and dependent gametophyte
Siphonogamous fertilization
Fusion of male gametes with egg cell and secondary nucleus
Development of ovule into seed
EASY
