Praying mantis is a good example of:
1. Mullerian mimicry
2. Warning colouration
3. Social insects
4. Camouflage
Which one of the following statements is correct?
| 1. | Neurons regulate endocrine activity, but not vice versa |
| 2. | Endocrine glands regulate neural activity and the nervous system regulates endocrine glands |
| 3. | Neither hormones control neural activity nor the neurons control endocrine activity |
| 4. | Endocrine glands regulate neural activity, but not vice versa |
Examination of the blood of a person suspected of having anaemia, shows large, immature, nucleated erythrocytes without haemoglobin. Supplementing his diet with which of the following, is likely to alleviate his symptoms?
1. Thiamine
2. Folic acid and cobalamine
3. Riboflavin
4. Iron compounds
Farmers in a particular region were concerned that pre-mature yellowing of leaves of a pulse crop might cause a decrease in the yield. Which treatment could be most beneficial to obtain maximum seed yield?
| 1. | Frequent irrigation of the crop |
| 2. | Treatment of the paints with cytokinins along with a small dose of nitrogenous fertilizer |
| 3. | Removal of all yellow leaves and spraying the remaining green leaves with 2,4,5-trichlorophenoxy acetic acid |
| 4. | Application of iron and magnesium to promote the synthesis of chlorophyll |
In which of the following fruits is the edible part the aril?
1. Custard apple
2. Pomegranate
3. Orange
4. Litchi
Which one of the following amino acids was not found to be synthesized in Miller’s experiment?
| 1. | Glycine | 2. | Aspartic acid |
| 3. | Glutamic acid | 4. | Alanine |
Crop plants grown in monoculture are:
1. low in yield
2. free from intraspecific competition
3. characterized by a poor root system
4. highly prone to pests
Montreal protocol which calls for appropriate action to protect the ozone layer from human activities was passed in the year:
1. 1986
2. 1987
3. 1988
3. 1985
The formula for exponential population growth is:
1. dt/dN= rN
2. dN/rN= dt
3. rN/dN= dt
4. dN/dt= rN
Which one of the following is not used for the construction of ecological pyramids?
| 1. | Dry weight | 2. | Number of individuals |
| 3. | Rate of energy | 4. | Fresh weight |
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