Question
| Column A | Column B |
| (1) Frederick Griffith | (a) Test tube assay |
| (2) Avery, McCarty and MacLeod | (b) Streptococcus pneumoniae |
| (3) Alfred Hershey and Martha Chase | (c) E. coli |
| (4) Meselson and Stahl | (d) Bacteriophages |
| Column A | Column B |
| (1) Frederick Griffith | (a) Test tube assay |
| (2) Avery, McCarty and MacLeod | (b) Streptococcus pneumoniae |
| (3) Alfred Hershey and Martha Chase | (c) E. coli |
| (4) Meselson and Stahl | (d) Bacteriophages |
| Column A | Column B |
| (1) Frederick Griffith | (b) Streptococcus pneumoniae |
| (2) Avery, McCarty and MacLeod | (a) Test tube assay |
| (3) Alfred Hershey and Martha Chase | (d) Bacteriophages |
| (4) Meselson and Stahl | (c) E. coli |
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| Respiratory organs | Alternative name |
| (1) Larynx | (a) Lid of larynx |
| (2) Trachea | (b) Air sacs |
| (3) Alveoli | (c) Sound box |
| (4) Epiglottis | (d) Windpipe |
| Column I (Phenomena) | Column II (Effect) |
| (1) Eutrophication | (a) Soil erosion |
| (2) Biomagnification | (b) Prevention of extinction |
| (3) Conservation | (c) Accumulation of non-biodegradable substance |
| (4) Deforestation | (d) Death of aquatic ecosystem |