What are the appropriate preservatives and labeling requirements for biological specimens?

here are the solutions to the questions:

5. a) i) Ethanol ii) Formalin (or formaldehyde solution)

   b)
   i) Obtain the specimen and clean it gently to remove any dirt or debris.
   ii) Inject the specimen with a preservative (e.g., formalin) to ensure internal organs are preserved.
   iii) Place the specimen in a suitable container and completely immerse it in the preservative solution.
   iv) Seal the container tightly to prevent evaporation of the preservative and label it appropriately.

   c)
   i) Name of the specimen
   ii) Date of collection
   iii) Place of collection
   iv) Collector's name

6. a) C: Coarse adjustment knob J: Mirror