Welcome to the NCERT Solutions for Class 11 Biology - Chapter Plant Kingdom. This page offers a step-by-step solution to the specific question from Exercise 1, Question 9: . With detailed answers and explanations for each chapter, students can strengthen their understanding and prepare confidently for exams. Ideal for CBSE and other board students, this resource will simplify your study experience.
(i) Red algae and brown algae
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Red algae |
Brown algae |
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|
1. |
Red algae are grouped under the class Rhodophyceae. |
1. |
Brown algae are grouped under the class Phaeophyceae. |
|
2. |
They contain floridean starch as stored food. |
2. |
They contain mannitol or laminarin as stored food. |
|
3. |
They contain the photosynthetic pigments chlorophylls a and d, and phycoerythrin. |
3. |
They contain the photosynthetic pigments chlorophylls a and c, and fucoxanthin. |
|
4. |
Their cell walls are composed of cellulose, pectin, and phycocolloids. |
4. |
Their cell walls are composed of cellulose and algin. |
|
5. |
Flagella are absent |
5. |
Two flagella are present |
(ii) Liverworts and moss
|
Liverworts |
Moss |
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|
1. |
They have unicellular rhizoids. |
1. |
They have multicellular rhizoids. |
|
2. |
Scales are present very often |
2. |
Scales are absent |
|
3. |
They are generally thalloid, with dichotomous branching. |
3. |
They are foliage, with lateral branching. |
|
4. |
Gemma cups are present |
4. |
Gemma cups are absent |
|
5. |
Sporophyte has very little photosynthetic tissue |
5. |
Sporophyte has abundant photosynthetic tissue |
(iii) Homosporous and heterosporous pteridophyte
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Homosporous pteridophytes |
Heterosporous pteridophytes |
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|
1. |
They bear spores that are of the same type. |
1. |
They bear two kinds of spores – microspores and megaspores. |
|
2. |
They produce bisexual gametophytes. |
2. |
They produce unisexual gametophytes. |
(iv) Syngamy and triple fusion
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Syngamy |
Triple fusion |
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|
1. |
It is the process of fusion of the male gamete with the egg in an angiosperm. |
1. |
It is the process of fusion of the male gamete with the diploid secondary nucleus in an angiosperm. |
|
2. |
A diploid zygote is formed as a result of syngamy. |
2. |
A triploid primary endosperm is formed as a result of triple fusion. |
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