If the speck remains visible regardless of changes in the objective or specimen movement, it indicates that the speck is located on the eyepiece. This is because the eyepiece remains constant in the optical path and does not change as the objectives or specimen are adjusted.
List I | List II |
---|---|
(A) D’Herelle and Twort | (I) Bacterial transformation |
(B) Beadle and Tatum | (II) Penicillin |
(C) Fleming | (III) One-gene-one-enzyme hypothesis |
(D) Griffith | (IV) Bacterial viruses |
Europium (Eu) resembles Calcium (Ca) in the following ways:
(A). Both are diamagnetic
(B). Insolubility of their sulphates and carbonates in water
(C). Solubility of these metals in liquid NH3
(D). Insolubility of their dichlorides in strong HCI
Choose the correct answer from the options given below: