| Column I | Column II | ||
| a. | Herbarium | i. | It is a place having a collection of preserved plants and animals. |
| b. | Key | ii. | A list that enumerates methodically all the species found in an area with brief description aiding identification. |
| c. | Museum | iii. | Is a place where dried and pressed plant specimens mounted on sheets are kept. |
| d. | Catalogue | iv. | A booklet containing a list of characters and their alternates which are helpful in identification of various taxa. |
Three identical heat conducting rods are connected in series as shown in the figure. The rods on the sides have thermal conductivity 2K while that in the middle has thermal conductivity K. The left end of the combination is maintained at temperature 3T and the right end at T. The rods are thermally insulated from outside. In steady state, temperature at the left junction is \(T_1\) and that at the right junction is \(T_2\). The ratio \(T_1 / T_2\) is 
