267345
A research student collected certain alga and found that its cells contained both chlorophyll $a$ and chlorophyll $d$ as well as phycoerythrin. On the basis of his observation, the students conclude that the alga belongs to
1 Rhodophyceae
2 bacillariophyceae
3 Chlorophyceae
4 phaeophyceae
Explanation:
(a) In green algae (chlorophyceae), the photosynthetic pigments are chlorophyll $a$ and $b$, carotenes and xanthophylls. In phaeophyceae (brown algae), the pigments are chlorophyll $a,c$ and carotenes and fucoxanth. Rhodophyceae are red algae and contain the major pigment as chlorophyll a and phycoerythrin. Phycoerythrin gives red colour to rhodophyceae.
NCERT Page-33 / N-27
Plant kingdom
267346
If you are asked to classify the various algae into distinct groups then which of the following characters you should choosefor the classification?
1 Nature of habitat
2 Structural organization of thallus
3 Chemical composition of the cell wall
4 Types of pigments present in the cell
Explanation:
(d)The classification of algae can be visually done easily on the basis of colours, due to the presence of different pigments inside them.
NCERT Page-33 / N-23
Plant kingdom
267347
Which of the following pairs is incorrectly matched?
1 Chlorophyceae - Major pigments are chl a and $b$.
2 Phaeophyceae - Cell wall is made up of cellulose and algin.
3 Rhodophyceae - Stored food is mannitol.
4 Chlorophyceae - Cell wall is made up of cellulose.
Explanation:
(c) Rhodophyceae is red algae in which food is stored as floridean starch which is very similar to amylopectin and glycogen in structure.
NCERT Page-33 / N-27
Plant kingdom
267348
A student was given a sample to observe under the microscope. He observed and found that the sample is the most common type of spore involved in asexual reproduction in algae. Identify the spore.
1 Zoospore
2 Endospore
3 Hypnospore
4 None of these
Explanation:
(a) Asexual reproduction (in algae) is by the production of different types of spores, and the most common type is zoospore. Zoospores are flagellated (motile) and on germination give rise to new plants.
267345
A research student collected certain alga and found that its cells contained both chlorophyll $a$ and chlorophyll $d$ as well as phycoerythrin. On the basis of his observation, the students conclude that the alga belongs to
1 Rhodophyceae
2 bacillariophyceae
3 Chlorophyceae
4 phaeophyceae
Explanation:
(a) In green algae (chlorophyceae), the photosynthetic pigments are chlorophyll $a$ and $b$, carotenes and xanthophylls. In phaeophyceae (brown algae), the pigments are chlorophyll $a,c$ and carotenes and fucoxanth. Rhodophyceae are red algae and contain the major pigment as chlorophyll a and phycoerythrin. Phycoerythrin gives red colour to rhodophyceae.
NCERT Page-33 / N-27
Plant kingdom
267346
If you are asked to classify the various algae into distinct groups then which of the following characters you should choosefor the classification?
1 Nature of habitat
2 Structural organization of thallus
3 Chemical composition of the cell wall
4 Types of pigments present in the cell
Explanation:
(d)The classification of algae can be visually done easily on the basis of colours, due to the presence of different pigments inside them.
NCERT Page-33 / N-23
Plant kingdom
267347
Which of the following pairs is incorrectly matched?
1 Chlorophyceae - Major pigments are chl a and $b$.
2 Phaeophyceae - Cell wall is made up of cellulose and algin.
3 Rhodophyceae - Stored food is mannitol.
4 Chlorophyceae - Cell wall is made up of cellulose.
Explanation:
(c) Rhodophyceae is red algae in which food is stored as floridean starch which is very similar to amylopectin and glycogen in structure.
NCERT Page-33 / N-27
Plant kingdom
267348
A student was given a sample to observe under the microscope. He observed and found that the sample is the most common type of spore involved in asexual reproduction in algae. Identify the spore.
1 Zoospore
2 Endospore
3 Hypnospore
4 None of these
Explanation:
(a) Asexual reproduction (in algae) is by the production of different types of spores, and the most common type is zoospore. Zoospores are flagellated (motile) and on germination give rise to new plants.
267345
A research student collected certain alga and found that its cells contained both chlorophyll $a$ and chlorophyll $d$ as well as phycoerythrin. On the basis of his observation, the students conclude that the alga belongs to
1 Rhodophyceae
2 bacillariophyceae
3 Chlorophyceae
4 phaeophyceae
Explanation:
(a) In green algae (chlorophyceae), the photosynthetic pigments are chlorophyll $a$ and $b$, carotenes and xanthophylls. In phaeophyceae (brown algae), the pigments are chlorophyll $a,c$ and carotenes and fucoxanth. Rhodophyceae are red algae and contain the major pigment as chlorophyll a and phycoerythrin. Phycoerythrin gives red colour to rhodophyceae.
NCERT Page-33 / N-27
Plant kingdom
267346
If you are asked to classify the various algae into distinct groups then which of the following characters you should choosefor the classification?
1 Nature of habitat
2 Structural organization of thallus
3 Chemical composition of the cell wall
4 Types of pigments present in the cell
Explanation:
(d)The classification of algae can be visually done easily on the basis of colours, due to the presence of different pigments inside them.
NCERT Page-33 / N-23
Plant kingdom
267347
Which of the following pairs is incorrectly matched?
1 Chlorophyceae - Major pigments are chl a and $b$.
2 Phaeophyceae - Cell wall is made up of cellulose and algin.
3 Rhodophyceae - Stored food is mannitol.
4 Chlorophyceae - Cell wall is made up of cellulose.
Explanation:
(c) Rhodophyceae is red algae in which food is stored as floridean starch which is very similar to amylopectin and glycogen in structure.
NCERT Page-33 / N-27
Plant kingdom
267348
A student was given a sample to observe under the microscope. He observed and found that the sample is the most common type of spore involved in asexual reproduction in algae. Identify the spore.
1 Zoospore
2 Endospore
3 Hypnospore
4 None of these
Explanation:
(a) Asexual reproduction (in algae) is by the production of different types of spores, and the most common type is zoospore. Zoospores are flagellated (motile) and on germination give rise to new plants.
267345
A research student collected certain alga and found that its cells contained both chlorophyll $a$ and chlorophyll $d$ as well as phycoerythrin. On the basis of his observation, the students conclude that the alga belongs to
1 Rhodophyceae
2 bacillariophyceae
3 Chlorophyceae
4 phaeophyceae
Explanation:
(a) In green algae (chlorophyceae), the photosynthetic pigments are chlorophyll $a$ and $b$, carotenes and xanthophylls. In phaeophyceae (brown algae), the pigments are chlorophyll $a,c$ and carotenes and fucoxanth. Rhodophyceae are red algae and contain the major pigment as chlorophyll a and phycoerythrin. Phycoerythrin gives red colour to rhodophyceae.
NCERT Page-33 / N-27
Plant kingdom
267346
If you are asked to classify the various algae into distinct groups then which of the following characters you should choosefor the classification?
1 Nature of habitat
2 Structural organization of thallus
3 Chemical composition of the cell wall
4 Types of pigments present in the cell
Explanation:
(d)The classification of algae can be visually done easily on the basis of colours, due to the presence of different pigments inside them.
NCERT Page-33 / N-23
Plant kingdom
267347
Which of the following pairs is incorrectly matched?
1 Chlorophyceae - Major pigments are chl a and $b$.
2 Phaeophyceae - Cell wall is made up of cellulose and algin.
3 Rhodophyceae - Stored food is mannitol.
4 Chlorophyceae - Cell wall is made up of cellulose.
Explanation:
(c) Rhodophyceae is red algae in which food is stored as floridean starch which is very similar to amylopectin and glycogen in structure.
NCERT Page-33 / N-27
Plant kingdom
267348
A student was given a sample to observe under the microscope. He observed and found that the sample is the most common type of spore involved in asexual reproduction in algae. Identify the spore.
1 Zoospore
2 Endospore
3 Hypnospore
4 None of these
Explanation:
(a) Asexual reproduction (in algae) is by the production of different types of spores, and the most common type is zoospore. Zoospores are flagellated (motile) and on germination give rise to new plants.
