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Q. No.Select the incorrect statement about artificial system of classification of Linnaeus
| 1. | It is called artificial system because it is based on only one or two characters |
| 2. | It was based on androecium structure |
| 3. | It is also called sexual system as he chiefly used characters of stamens |
| 4. | It divides flowering and non-flowering plants into two categories |
Subtopic: Classification System |
From NCERT
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Which of the following statements about numerical taxonomy is incorrect?
| 1. | It is based on the quantification of observable characteristics and the use of statistical methods. |
| 2. | It gives equal importance to all characteristics and does not distinguish between homologous and analogous traits. |
| 3. | It relies solely on genetic data and molecular markers for classification. |
| 4. | It uses computer algorithms to analyze large datasets and determine relationships between organisms. |
Subtopic: Classification System |
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Classification of organisms based on measurable similarities and differences rather than genetic makeup and evolutionary descent is called phenetics. What type of biological classification system does it belong to?
| 1. | Artificial | 2. | Phylogenetic |
| 3. | Cytotaxonomy | 4. | Numerical taxonomy |
Subtopic: Classification System: I | Classification System |
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Given are the following five statements (I - V) for your consideration:
| I: | In Equisetum, the female gametophyte is retained on the parent sporophyte |
| II: | In Ginkgo, male gametophyte is not independent |
| III: | The sporophyte in Marchantia is more developed than that in Polytrichum |
| IV: | Sexual reproduction in Volvox is isogamous |
| V: | The spores of slime moulds lack cell walls |
How many of the above statements is/are correct?
| 1. | Three | 2. | Four |
| 3. | One | 4. | Two |
Subtopic: Algae | Pteridophytes | Gymnosperms |
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AIPMT - 2012
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If you are asked to classify the various algae into distinct groups, which of the following character would you choose?
1. Types of pigments present in the cell
2. Nature of stored food material in the cell
3. Structural organization of thallus
4. Chemical composition of the cell wall
Subtopic: Algae |
58%
From NCERT
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Consider the given statements:
1. Only Statement II is correct
2. Both Statement I and Statement II are correct
3. Only Statement III is correct
4. All Statements are correct
| Statement I: | All three classes of algae possess cellulose in their cell walls. |
| Statement II: | Rhodophyceae lacks flagella, whereas Chlorophyceae can have up to 8 flagella. |
| Statement III: | Phaeophyceae stores food in the form of laminarin and starch. |
2. Both Statement I and Statement II are correct
3. Only Statement III is correct
4. All Statements are correct
Subtopic: Algae |
From NCERT
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Which of the following algae is not haplo-diplontic?
1. Kelps
2. Ectocarpus
3. Spirogyra
4. Polysiphonia
1. Kelps
2. Ectocarpus
3. Spirogyra
4. Polysiphonia
Subtopic: Algae |
59%
From NCERT
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Read the following statements and identify the characters related to the alga shown in the diagram:
| a. | It is a member of Chlorophyceae. |
| b. | Food is stored in the form of starch. |
| c. | It is a monoecious plant showing oogonium and antheridium. |
| d. | Food is stored in the form of laminarin or mannitol. |
| e. | It shows dominance of pigments chlorophyll a, c and Fucoxanthin. |
1. (a) and (b) only
2. (a), (b) and (c) only
3. (a), (c) and (d) only
4. (c), (d) and (e) only
Subtopic: Chlorophyceae: Green Algae: I |
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NEET - 2022
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Which of the following statements is true about zoospores and gametes in brown algae?
| 1. | Both zoospores and gametes in brown algae are motile and have equal sized flagella. |
| 2. | Zoospores are non-motile while gametes are motile, both lacking flagella. |
| 3. | Zoospores are motile with two flagella, while gametes are non-motile. |
| 4. | Zoospores and gametes are both motile and similar in the number of flagella. |
Subtopic: Pheophyceae: Brown Algae |
From NCERT
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Consider the following statements regarding brown algae:
| I. | The pigments are chl a, c and xanthophylls, fucoxanthin |
| II. | Storage food is laminarin and mannitol |
| III. | The cellulosic cell wall is covered with algin |
| IV. | They have a centrally located vacuole |
| V. | Their photosynthetic organs are called as fronds - leaf like structures |
| VI. | They have pear shaped biflagellate zoospores |
| VII. | They have two unequal laterally attached flagella. |
The number of correct statements is
1. 5
2. 6
3. 7
4. 4
Subtopic: Pheophyceae: Brown Algae |
59%
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