In water hyacinth and water lily, pollination takes place by:
1. Water currents only
2. Wind and water
3. Insects and water
4. Insects or wind
According to Robert May, global species diversity is about:
1. 20 Million
2. 50 Million
3. 7 Million
4. 1.5 Million
Match the following columns and select the correct option.
| Column I | Column II | ||
| (a) | 6 - 15 pairs of gill slits | (i) | Trygon |
| (b) | Heterocercal caudal fin | (ii) | Cyclostomes |
| (c) | Air Bladder | (iii) | Chondrichthyes |
| (d) | Poison sting | (iv) | Osteichthyes |
| Options: | (a) | (b) | (c) | (d) |
| 1. | (iii) | (iv) | (i) | (ii) |
| 2. | (iv) | (ii) | (iii) | (i) |
| 3. | (i) | (iv) | (iii) | (ii) |
| 4. | (ii) | (iii) | (iv) | (i) |
Match the following columns and select the correct option.
| Column-I | Column-II | ||
| a. | Bt cotton | (i) | Gene therapy |
| b. | Adenosine deaminase deficiency | (ii) | Cellular defense |
| c. | RNAi | (iii) | Detection of HIV infection |
| d. | PCR | (iv) | Bacillus thuringiensis |
| a | b | c | d | |
| 1. | (iii) | (ii) | (i) | (iv) |
| 2. | (ii) | (iii) | (iv) | (i) |
| 3. | (i) | (ii) | (iii) | (iv) |
| 4. | (iv) | (i) | (ii) | (iii) |
Match the following columns and select the correct option
| Column-I | Column-II | ||
| a. | The organ of Corti | (i) | Connects the middle ear and pharynx |
| b. | Cochlea | (ii) | Coiled part of the labyrinth |
| c. | Eustachian tube | (iii) | Attached to the oval window |
| d. | Stapes | (iv) | Located on the basilar membrane |
| (a) | (b) | (c) | (d) | |
| 1. | (iii) | (i) | (iv) | (ii) |
| 2. | (iv) | (ii) | (i) | (iii) |
| 3. | (i) | (ii) | (iv) | (iii) |
| 4. | (ii) | (i) | (i) | (iv) |
Which one of the following is the most abundant protein in animals?
| 1. | Collagen
|
2. | Lectin
|
| 3. | Insulin
|
4. | Hemoglobin |
Identify the wrong statement with a reference to immunity.
| 1. | When ready-made antibodies are directly given, it is called “Passive immunity". |
| 2. | Active immunity is quick and gives a full response. |
| 3. | Foetus receives some antibodies from the mother, it is an example of passive immunity |
| 4. | When exposed to antigen(living or dead) antibodies are produced in the host's body. It is called "Active immunity |
Montreal Protocol was signed in 1987 for the control of:
| 1. | Emission of ozone-depleting substances |
| 2. | Release of Green House gases |
| 3. | Disposal of e-waste |
| 4. | Transport of genetically modified organisms from one country to another |
Match the trophic levels with their correct species examples in the green land ecosystem
| Column-I | Column-II | ||
| (a) | Fourth trophic level | (i) | Cow |
| (b) | Second trophic level | (ii) | Vulture |
| (c) | First trophic level | (iii) | Rabbit |
| (d) | Third trophic level | (iv) | Grass |
Select the correct option:
| Options: | (a) | (b) | (c) | (d) |
| 1. | (iii) | (ii) | (i) | (iv) |
| 2. | (iv) | (iii) | (ii) | (i) |
| 3. | (i) | (ii) | (iii) | (iv) |
| 4. | (ii) | (iii) | (iv) | (i) |
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