Which of the following statements about Rhodophyceae is correct?
Certain red algae (Rhodophyceae) produce hydrocolloids like carrageen, used commercially.
Ref: NCERT Class 11 Biology Chapter 3: Plant Kingdom Algae - Phaeophyceae and Rhodophyceae
Algae - Phaeophyceae and Rhodophyceae
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Which class of algae stores food in the form of laminarin?
Members of Phaeophyceae (brown algae) store food in the form of laminarin and mannitol.
Ref: NCERT Class 11 Biology Chapter 3: Plant Kingdom Algae - Phaeophyceae and Rhodophyceae
Which of the following statements about Phaeophyceae is incorrect?
Phaeophyceae exhibit isogamous, anisogamous, or oogamous sexual reproduction, not only oogamy.
Ref: NCERT Class 11 Biology Chapter 3: Plant Kingdom Algae - Phaeophyceae and Rhodophyceae
Which pigment is responsible for the brown color in Phaeophyceae?
Fucoxanthin, a xanthophyll pigment, gives brown algae their characteristic color.
Ref: NCERT Class 11 Biology Chapter 3: Plant Kingdom Algae - Phaeophyceae and Rhodophyceae
Which of the following is a characteristic feature of brown algae?
Brown algae store food in the form of complex carbohydrates like mannitol and laminarin.
Ref: NCERT Class 11 Biology Chapter 3: Plant Kingdom Algae - Phaeophyceae and Rhodophyceae
Which of the following statements about algae is incorrect?
Only certain brown algae (Phaeophyceae) produce algin, not all algae.
Ref: NCERT Class 11 Biology Chapter 3: Plant Kingdom Algae - Phaeophyceae and Rhodophyceae
Which of the following statements about Phaeophyceae is correct?
The plant body of Phaeophyceae (brown algae) has a holdfast, stipe, and frond, especially in forms like kelps.
Ref: NCERT Class 11 Biology Chapter 3: Plant Kingdom Algae - Phaeophyceae and Rhodophyceae
Which hydrocolloid obtained from brown algae is used commercially in food industries?
Algin, extracted from brown algae (Phaeophyceae), is a hydrocolloid used in food and pharmaceutical industries.
Ref: NCERT Class 11 Biology Chapter 3: Plant Kingdom Algae - Phaeophyceae and Rhodophyceae
Which pigment is absent in brown algae?
Brown algae (Phaeophyceae) contain chlorophyll a, c, and fucoxanthin but lack chlorophyll b.
Ref: NCERT Class 11 Biology Chapter 3: Plant Kingdom Algae - Phaeophyceae and Rhodophyceae
Which of the following statements about Phaeophyceae is correct?
Kelps, which are brown algae (Phaeophyceae), can grow massively, reaching up to 100 meters.
Ref: NCERT Class 11 Biology Chapter 3: Plant Kingdom Algae - Phaeophyceae and Rhodophyceae
What is the primary storage product in Phaeophyceae?
The primary storage product in Phaeophyceae (brown algae) is laminarin, a polysaccharide.
Ref: NCERT Class 11 Biology Chapter 3: Plant Kingdom Algae - Phaeophyceae and Rhodophyceae
Which class of algae produces hydrocolloids like algin?
Phaeophyceae (brown algae) produce hydrocolloids like algin, which are commercially important.
Ref: NCERT Class 11 Biology Chapter 3: Plant Kingdom Algae - Phaeophyceae and Rhodophyceae