When the centromere is situated in the middle of two equal arms of chromosomes, the chromosome is referred as:
| 1. | Sub-metacentric | 2. | Acrocentric |
| 3. | Metacentric | 4. | Telocentric |
In the equation GPP - R = NPP,
R represents:
| 1. | Environment factor |
| 2. | Respiration losses |
| 3. | Radiant energy |
| 4. | Retardation factor |
Match List I with List II
| List - I | List - II | ||
| (a) | Cells with active cell division capacity | (i) | Vascular tissues |
| (b) | Tissue having all cells similar in structure and function | (ii) | Meristematic tissue |
| (c) | Tissue having different types of cells | (iii) | Sclereids |
| (d) | Dead cells with highly thickened walls and narrow lumen | (iv) | Simple tissue |
Select the correct answer from the options given below.
| (a) | (b) | (c) | (d) | |
| 1. | (i) | (ii) | (iii) | (iv) |
| 2. | (iii) | (ii) | (iv) | (i) |
| 3. | (ii) | (iv) | (i) | (iii) |
| 4. | (iv) | (iii) | (ii) | (i) |
Which of the following stages of meiosis involves division of centromere?
| 1. | Anaphase II | 2. | Telophase II |
| 3. | Metaphase I | 4. | Metaphase II |
Match List - I with List - II
| List -I | List -II | ||
| (a) | Cristae | (i) | Primary constriction in chromosome |
| (b) | Thylakoids | (ii) | Disc-shaped sacs in Golgi apparatus |
| (c) | Centromere | (iii) | Infoldings in mitochondria |
| (d) | Cisternae | (iv) | Flattened membranous sacs in stroma of plastids |
Choose the correct answer from the options given below.
| (a) | (b) | (c) | (d) | |
| 1. | (iii) | (iv) | (i) | (ii) |
| 2. | (ii) | (iii) | (iv) | (i) |
| 3. | (iv) | (iii) | (ii) | (i) |
| 4. | (i) | (iv) | (iii) | (ii) |
The term used for the transfer of pollen grains from anthers of one plant to the stigma of a different plant which during pollination, brings genetically different types of pollen grains to the stigma, is:
1. Chasmogamy
2. Cleistogamy
3. Xenogamy
4. Geitonogamy
Which of the following algae contains mannitol as reserve food material?
1. Volvox
2. Ulothrix
3. Ectocarpus
4. Gracilaria
DNA strands on a gel stained with ethidium bromide, when viewed under UV radiation, appear as:
1. Dark red bands
2. Bright blue bands
3. Yellow bands
4. Bright orange bands
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