Method |
Mode of action |
||
A. |
The pill |
1. |
Prevents sperms from reaching cervix |
B. |
Condom |
2. |
Prevents implantation |
C. |
Vasectomy |
3. |
Prevents ovulation |
D. |
Copper-T |
4. |
Semen contains no sperms |
1. A-3 B-1 C-4 D-2
2. A-4 B-1 C-2 D-3
3. A-3 B-4 C-1 D-2
4. A-2 B-3 C-1 D-4
1. | Inspiratory reserve volume plus tidal volume |
2. | Total lung capacity minus expiratory reserve volume |
3. | Inspiratory reserve volume plus expiratory reserve volume |
4. | Total lung capacity minus residual volume |
1. | Pteris | 2. | Funaria |
3. | Polytrichum | 4. | Cedrus |
1. | Flavr savr tomatoes |
2. | Starlink maize |
3. | Bt soybean |
4. | Golden rice |
A lake near a village suffered heavy mortality of fish within a few days. Consider the following reasons for this:
1. | Lots of urea and phosphate fertilizer were used in the crops in the vicinity. |
2. | The area was sprayed with DDT by an aircraft. |
3. | The lake water turned green and stinky |
4. | Phytoplankton populations in the lake declined initially, thereby, greatly reducing photosynthesis. |
Which two of the above were the main causes of fish mortality in the lake?
1. 2, 3
2. 3, 4
3. 1, 3
4. 1, 2
Given below is a diagrammatic cross-section of a single loop of human cochlea.
1. | B: Tectorial membrane C: Perilymph D: Secretory cells |
2. | C: Endolymph D: Sensory hair cells A: Serum |
3. | D: Sensory hair cells A: Endolymph B: Tectorial membrane |
4. | A: Perilymph B: Tectorial membrane C: Endolymph |
1. vessels and tracheid differentiation
2. leaf abscission
3. annual plants
4. floral parts.
1. phellogen
2. plerome
3. periblem
4. dermatogen
1. | Bradyrhizobium | 2. | Clostridium |
3. | Frankia | 4. | Azorhizobium |
1. | Gastric juice will be deficient in chymosin |
2. | Gastric juice will be deficient in pepsinogen |
3. | In the absence of HCl secretion, inactive pepsinogen is not converted into the active enzyme pepsin |
4. | Enterokinase will not be released from the duodenal mucosa and so trypsinogen is not converted to trypsin |