What is the figure given below showing in particular?
1. Ovarian cancer
2. Uterine cancer
3. Tubectomy
4. Vasectomy
In an area where DDT had been used extensively, the population of birds declined significantly because:
1. Birds stopped laying eggs
2. Earthworms in the area got eradicated
3. Cobras were feeding exclusively on birds
4. Many of the birds laid eggs, but the eggs did not hatch
The figure below is the diagrammatic representation of the E.coli vector pBR 322. Which one of the given options correctly identifies its certain components (s)?
1. Ori-original restriction enzyme
2. Rop-reduced osmotic pressure
3. Hind III, Eco RI-selectable markers
4. AmpR, tetiR-antibiotic resistance genes
Which part would be most suitable for raising virus-free plants for micro propagation?
1. Bark
2. Vascular tissue
3. Meristem
4. Node
Which one of the following is a wrong statement?
| 1. | Most of the forests have been lost in tropical areas |
| 2. | Ozone in upper part of atmosphere is harmful to animals |
| 3. | Greenhouse effect is a natural phenomenon |
| 4. | Eutrophication is a natural phenomenon in freshwater bodies |
Companion cells are closely associated with:
1. Sieve elements
2. Vessel elements
3. Trichomes
4. Guard cells
Common cold differs from pneumonia in, that:
| 1. | Pneumonia is a communicable disease, whereas common cold is a nutritional deficiency disease |
| 2. | Pneumonia can be prevented by a live attenuated bacterial vaccine, whereas the common cold has no effective vaccine |
| 3. | Common cold is caused by a virus, while Pneumonia is caused by a bacterium. |
| 4. | Pneumonia pathogen infects alveoli whereas common cold affects the nose and the respiratory passage but not the lungs |
Pheretima and its close relatives derive nourishment from:
1. Sugarcane roots
2. Decaying fallen leaves and soil organic matter
3. Soil insects
4. Small pieces of fresh fallen leaves of maize
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