Which of the following is an example of oogamous reproduction?

(1) Ulothrix

(2) Udorina

(3) Spirogyra

(4) Fucus

Subtopic:  Algae |
 90%
From NCERT
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Algae are useful

(1) Because at least half of the total carbon dioxide fixation on Earth is carried out by algae through photosynthesis.

(2) Algae being photosynthetic can increase the level of dissolved oxygen in their immediate environment

(3) They are primary producers of energy rich compounds and form the basis of the food cycles of all aquatic animals

(4) All of the above

Subtopic:  Algae |
 97%
From NCERT
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Hydrocolloid is

(1) Water soluble substance

(2) Water holding substance

(3) Hydrogen gas containing substance

(4) Oxygen gas containing substance

Subtopic:  Algae |
 96%
From NCERT
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Algin

(1) Water holding substance

(2) Obtained from brown algae

(3) Non sulfated water holding substance

(4) All of these

Subtopic:  Algae |
 89%
From NCERT
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Carrageen

(1) Water holding substance

(2) Obtained from red algae

(3) Sulfated water holding substance

(4) All of these

Subtopic:  Algae |
 94%
From NCERT
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Agar is not obtained from

(1) Gelidium

(2) Gracilaria

(3) Volvox

(4) All of these

Subtopic:  Algae |
 90%
From NCERT
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Which of the marine algae is not used as food?

(1) Laminaria

(2) Sargassum

(3) Porphyra

(4) Volvox

Subtopic:  Algae |
 94%
From NCERT
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Pyrenoid is

(1) Storage bodies located in cytoplasm of chloropbyceae

(2) Storage bodies located in cytoplasm of Phaeophyceae

(3) Storage bodies located in chloroplast of chlorophyceae

(4) Storage bodies located in chloroplast of Phaeophyceae

Subtopic:  Chlorophyceae: Green Algae: I | Chlorophyceae: Green Algae |
 85%
From NCERT
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. Pyrenoid has

(1) Protein+Starch

(2) Only Protein

(3) Only Starch

(4) Fats+ Starch

Subtopic:  Chlorophyceae: Green Algae: I | Chlorophyceae: Green Algae |
 93%
From NCERT
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Vegetative reproduction in chlorophyceae takes place by

(1) Fragmentation+ spore formation

(2) Only spore formation

(3) Only Fragmentation

(4) Isogamous

Subtopic:  Chlorophyceae: Green Algae: I | Chlorophyceae: Green Algae |
 73%
From NCERT
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