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Algae
Appears in
Concepts tested here
- Isogamy in Spirogyra 2
- Sex organs of Chara 2
- Edible algae
- Motile gametes in brown algae
- Stored food in algae
All Questions
2015 AIPMT-I 2 questions
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Which one of the following statements is wrong?Mannitol is the stored food of Phaeophyceae (brown algae).
In Rhodophyceae (red algae) food is stored as floridean starch, so this statement is wrong. -
Male gametes are flagellated inEctocarpus is a brown alga whose male gametes are motile with two unequal flagella.
Polysiphonia (red alga) has non-flagellated male gametes.
Anabaena reproduces vegetatively or asexually by spores.
Spirogyra shows isogamous reproduction with non-motile gametes.
2014 AIPMT 3 questions
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Which one of the following shows isogamy with non-flagellated gametes?Spirogyra reproduces sexually by conjugation, in which the fusing gametes are similar in size (isogamy) and non-flagellated.
Ulothrix has flagellated isogametes, Ectocarpus has flagellated gametes and Sargassum is oogamous. -
Which one of the following is wrong about Chara?In Chara the female organ (oogonium or nucule) lies above and the male organ (antheridium or globule) lies below it, both on the same plant.
So 'upper antheridium and lower oogonium' is wrong. -
An alga which can be employed as food for human being is:Chlorella is a unicellular alga rich in proteins and is used as a food supplement, even by space travellers.
2013 NEET 2 questions
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Isogamous condition with non-flagellated gametes is found in:In Spirogyra the fusing gametes are similar in size and non-flagellated (non-motile isogametes).
Chlamydomonas gametes are flagellated; Fucus and Volvox are oogamous. -
Monoecious plant of Chara shows occurrence of:In monoecious Chara the oogonium (nucule) lies above the antheridium (globule) on the same plant.