(i) Red algae and brown algae
|
Red algae |
Brown algae |
||
|
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 |
||
|
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
|
Homosporous pteridophytes |
Heterosporous pteridophytes |
||
|
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
|
Syngamy |
Triple fusion |
||
|
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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(i) Red algae and brown algae
Red algae
Brown algae
1.
Red algae are grouped under the class Rhodophyceae.
...
Step-by-step explanation:
• (i) Red algae and brown algae
•
•
•
•
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