Of the total incident solar radiation, proportion of PAR is:
1. about 60%
2. about 50%
3. more than 80%
4. about 70%
2. about 50%
3. more than 80%
4. about 70%
| 1. | Calcium | 2. | Potassium |
| 3. | Sulphur | 4. | Phosphorus |
| 1. | Clostridium | 2. | Trichoderma |
| 3. | Aspergillus | 4. | Saccharomyces |
A large proportion of oxygen is left unused in the human blood even after its uptake by body tissues. This O2:
1. raises the Pco2 blood to 75 mm of Hg
2. is enough to keep oxyhaemoglobin
3. helps in releasing more O2 to the epithelial tissues
4. acts as a reserve during muscular exercise
| 1. | Human foetus developing inside the uterus draws nourishment from the mother |
| 2. | Head louse living on the human scalp as well as laying eggs on human hair |
| 3. | The cuckoo (koel) lays its eggs in a crow's nest |
| 4. | The female Anopheles bites and sucks blood from humans |
At which stage of HIV infection does one usually shows symptoms of AIDS?
| 1. | When viral DNA is produced by reverse transcriptase. |
| 2. | When HIV replicates rapidly in helper T-lymphocytes and damages a large number of these. |
| 3. | Within 15 days of sexual contact with an infected person. |
| 4. | When the infecting retrovirus enters host cells. |
1. Thousands of human beings died
2. Radioactive fall-out engulfed Bhopal
3. It took place on the night of December 2/3, 1984
4. Methyl isocyanate gas leakage took place
| 1. | all tissues except epidermis and vascular bundles |
| 2. | epidermis and cortex |
| 3. | all tissues internal to endodermis |
| 4. | all tissues external to endodermis |
1. C-Infundibulum, D-Fimbriae, E-Cervix
2. D-Oviducal funnel, E-Uterus, F-Cervix
3. A-perimetrium, B-Myometrium, C-Fallopian tube
4. B-Endometrium, C-Infundibulum, D-Fimbriae
1. Brassica
2. Zea maize
3. Jatropha
4. Pongamia
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