Pollen grains of many species cause seve...

Pollen grains of many species cause severe allergies & bronchial afflictions in some people often leading to chronic respiratory disorder such as :-

Asthma

Bronchitis

Both 1 & 2

Emphysema

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ALLEN-REPRODUCTION IN ORGANISMS AND SEXUAL REPRODUCTION IN FLOWERING PLANTS-EXERCISE-III (A) (NCERT BASED QUESTIONS)

Each cell of sporogenous tissue is potential pollen or microspore moth...
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In over 60% of angiosperms pollen grains are shed at
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Pollen grains of many species cause severe allergies & bronchial affli...
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In a pollen grain the small cell is spindle shaped, with dense cytopla...
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A typical angiosperm embryosac at maturity is :-
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Arising from the placenta are the megasporangia, commonly called:
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A large shield shaped cotyledon found in some monocotyledonous seeds i...
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In grasses, epicotyl has a shoot apex & a few leaf primordia enclosed ...
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Cleistogamous flowers are
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Although in most of species fruits are result of fertilisation, there ...
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Non-albuminous seeds occur in
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Persistent nucellus in the seed is known as
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Coconut water from a tender coconut is
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Fusion of one of the male gametes with egg nucleus is referred to as
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Endosperm of angiosperm is :-
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Transfer of pollen grains from the anther to the stigma of another flo...
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Perisperm is present in
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The part of pistil which acts as landing platform for pollen grain is
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The innermost wall layer of pollen sac is tapetum. Its function is in
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Two non motile male gametes in angiosperms are produced by :-
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