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. |
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
Column I [Classification method] |
Column II [Feature used] |
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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 |
Fusion of two gametes which are dissimilar in size is termed as
1. | Oogamy | 2. | Isogamy |
3. | Anisogamy | 4. | Zoogamy |
Consider the following statements regarding green algae:
I: | Pigments are located in definite plastids |
II: | Most have pyrenoids in chloroplasts |
III: | Cell wall has an inner layer of pectose and outer layer of cellulose |
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
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 |
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 |
Which of the following is not an example of an edible alga?
1. | Porphyra | 2. | Laminaria |
3. | Sargassum | 4. | Amanita |
Column I | Column II | |
1. | Main photosynthetic pigment | Chlorophyll a, b |
2. | Cell wall | Inner layer of cellulose and outer layer of pectose |
3. | Stored food | Starch |
4. | Flagellar number and insertion | 2-8. unequal. basal |
1. | Major pigments are chlorophyll a, c, fucoxanthin |
2. | Food is stored as complex carbohydrates which may be in the form of Laminarin or Mannitol |
3. | Vegetative cells have chitinous wall usually covered on the outside by a gelatinous coating of algin |
4. | Flagellar number and insertions are 2, unequal and lateral |