Class 11 Biology - Chapter Plant Kingdom NCERT Solutions | Differentiate between the following:- (i
Differentiate between the following:-
(i)red algae and brown algae
(ii) liverworts and moss
(iii) homosporous and heterosporous pteridophyte
(iv) syngamy and triple fusion
(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. |
More Questions From Class 11 Biology - Chapter Plant Kingdom
- Q:- Write a note on economic importance of algae and gymnosperms.
- Q:- What is heterospory? Briefly comment on its significance. Give two examples.
- Q:- Explain briefly the following terms with suitable examples:-
(i) protonema
(ii) antheridium
(iii) archegonium
(iv) diplontic
(v) sporophyll
(vi) isogamy - Q:- What is the basis of classification of algae?
- Q:-
Mention the ploidy of the following:
protonemal cell of a moss;
primary endosperm nucleus in dicot,
leaf cell of a moss;
prothallus cell of a fern;
gemma cell in Marchantia;
meristem cell of monocot,
ovum of a liverwort, and
zygote of a fern.
- Q:- Name three groups of plants that bear archegonia. Briefly describe the life cycle of any one of them.
- Q:- Describe the important characteristics of gymnosperms.
- Q:- Match the followings (column I with column II)
Column I Column II
(a) Chlamydomonas (i) Moss
(b) Cycas (ii) Pteridophyte
(c) Selaginella (iii) Algae
(d) Sphagnum (iv) Gymnosperm - Q:- How would you distinguish monocots from dicots?
- Q:- When and where does reduction division take place in the life cycle of a liverwort, a moss, a fern, a gymnosperm and an angiosperm?
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