1. | an artificial system based mainly on the androecium structure. |
2. | a natural system based on large number of natural affinities between flowering plants. |
3. | was a phylogenetic system based on evolutionary relationships. |
4. | was a chemotaxonomic system based on structure of homologous proteins. |
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In numerical taxonomy:
I: | computers are used and all the observable characters are taken into consideration. |
II: | hundreds of characters can be considered together and each character is given equal importance. |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. both I and II are incorrect
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1. | It is a natural system of classification. |
2. | It totally disregarded the external characters and did not include them to classify plants. |
3. | It used internal features like structure, anatomy, embryology and phytochemistry. |
4. | It was based on natural affinities among the organisms. |
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Column I [Classification method] |
Column II [Feature used] |
||
A. | Artificial | P. | Evolutionary relationships |
B. | Phylogenetic | Q. | Gross morphological characters |
C. | Chemotaxonomy | R. | Chemical constituents of plants |
D. | Cytotaxonomy | S. | Chromosome number, structure and behaviour |
A | B | C | D | |
1. | P | Q | S | R |
2. | Q | P | R | S |
3. | R | S | P | Q |
4. | S | R | Q | P |
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The form and size of algae is highly variable. Which of the following will not be true?
I: | Volvox is a colonial alga. |
II: | Ulothrix and Spirogyra do not form filaments. |
III: | Kelps form massive plants bodies. |
1. Only II | 2. Only III |
3. Both I and II | 4. Both II and III |
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Identify the incorrectly matched pair:
Alga | Sexual reproduction | |
I: | Ulothrix | Isogamous; non-flagellated gametes |
II: | Spirogyra | Isogamous; flagellated gametes |
III: | Udorina | Anisogamous |
IV: | Fucus | Oogamous |
1. | Only III | 2. | I, II and III |
3. | Only I and II | 4. | Only III and IV |
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I: | Algin is a hydrocolloid derived from brown algae |
II: | Carrageen is a hydrocolloid derived from green algae |
III: | Agar is a complex polysaccharide derived from red algae, Gelidium and Gracilaria |
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Which of the following is not an example of an edible alga?
1. | Porphyra | 2. | Laminaria |
3. | Sargassum | 4. | Amanita |
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Statement I: | It is single-celled green algae. |
Statement II: | It is used as a food supplement. |
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1. | The photosynthetic pigments are located within definite chloroplasts. |
2. | Chloroplasts are discoid in shape in all members of chlorophyceae. |
3. | Most of the members have one or more storage bodies called pyrenoids, which contain proteins besides starch, located in the chloroplasts. |
4. | Some green algae may store food in the form of oil droplets. |
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