dB is a standard abbreviation used for the quantitative expression of:

1. the density of bacteria in a medium

2. a particular pollutant

3. the dominant Bacillus in a culture

4. a certain pesticide

Which one of the following is one of the characteristics of a biological community?

Which one of the following statements about morula in humans is correct:

Coiling of garden pea tendrils around any support is an example of:

1. thigmotaxis

2. thigmonasty

3. thigmotropism

4. thermotaxis

The two gases making the highest relative contribution to the greenhouse gases are:

1. $C{O}_2$ $and$ $C{H}_4$

2. $C{H}_4$ $and$ $$ $N{O}_2$

3. $\mathrm{CFCs}$ $\mathrm{and}$ ${\mathrm{N}}_2\mathrm{O}$

4. $C{O}_2$ $and$ $N_{2}O$

Which one of the following is not used in organic farming?

1. Glomus

2. Earthworm

3. Oscillatoria

4. Snail

Stirred-tank bioreactors have been designed for:
1. Addition of preservatives to the product
2. Purification of the product
3. Ensuring anaerobic conditions in the culture vessel
4. Availability of oxygen throughout the process

An improved variety of transgenic basmati rice:

Infectious proteins are present in:

The part of the Fallopian tube closest to the ovary is:
1. Isthmus
2. Infundibulum
3. Cervix
4. Ampulla