Which of the following is incorrect about Cyanobacteria?
1. They are photoautotrophs
2. They lack heterocysts
3. They often form blooms in polluted water bodies
4. They have chlorophyll A similar to green plants
Phycoerythrin is the major pigment in :
1. Red algae
2. Blue-green algae
3. Green algae
4. Brown algae
Which of the following statements is incorrect about gymnosperms?
1. They are heterosporous
2. Male and female gametophytes are free-living
3. Most of them have narrow leaves with thick cuticle
4. Their seeds are not covered
Male and female gametophytes do not have an independent free-living existence in:-
1. Pteridophytes
2. Algae
3. Angiosperms
4. Bryophytes
Which of the following options does correctly represent the characteristic features of phylum Annelida?
| 1. | Triploblastic, unsegmented body, and bilaterally symmetrical. |
| 2. | Triploblastic, a segmented body, and bilaterally symmetrical. |
| 3. | Triploblastic, flattened body, and acoelomate condition. |
| 4. | Diploblastic, mostly marine and radially symmetrical. |
Match the following group of organisms with their respective distinctive characteristics and select the correct option :
| Organisms | Characteristics | ||
| (a) | Platyhelminthes | (i) | Cylindrical body with no segmentation |
| (b) | Echinoderms | (ii) | Warm blooded animals with direct development |
| (c) | Hemichordates | (iii) | Bilateral symmetry with incomplete digestive system |
| (d) | Aves | (iv) | Radial symmetry with indirect development |
| (a) | (b) | (c) | (d) | |
| 1. | (iii) | (iv) | (i) | (ii) |
| 2. | (ii) | (iii) | (iv) | (i) |
| 3. | (iv) | (i) | (ii) | (iii) |
| 4. | (i) | (ii) | (iii) | (iv) |
Match the following columns and select the correct option :
| Column - I | Column - II | ||
| (a) | Aptenodytes | (i) | Flying fox |
| (b) | Pteropus | (ii) | Angel fish |
| (c) | Pterophyllum | (iii) | Lamprey |
| (d) | Petromyzon | (iv) | Penguin |
| (a) | (b) | (c) | (d) | |
| 1. | (iii) | (iv) | (ii) | (i) |
| 2. | (iii) | (iv) | (i) | (ii) |
| 3. | (iv) | (i) | (ii) | (iii) |
| 4. | (ii) | (i) | (iv) | (iii) |
All vertebrates are chordates but all chordates are not vertebrates, why?
| 1. | Notochord is replaced by a vertebral column in adults of some chordates. |
| 2. | Ventral hollow nerve cord remains throughout life in some chordates. |
| 3. | All chordates possess a vertebral column. |
| 4. | All chordates possess notochord throughout their life. |
Correct position of floral parts over thalamus in the mustard plant is :
(1) Gynoecium occupies the highest position, while the other parts are situated below it.
(2) Margin of the thalamus grows upward, enclosing the ovary completely, and other parts arise below the ovary.
(3) Gynoecium is present in the center and other parts cover it partially.
(4) Gynoecium is situated in the center, and other parts of the flower are located at the rim of the thalamus, at the same level.
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