In angiosperm, the haploid, diploid and triploid structures of a fertilized embryo sac sequentially are:
Column-I | Column-II | ||
---|---|---|---|
(i) | First month | (a) | Separation of eye lids |
(ii) | Second month | (b) | Hairs on head |
(iii) | Fifth month | (c) | Heart |
(iv) | Six month | (d) | Limbs & digits |
List I (Spectral Lines of Hydrogen for transitions from) | List II (Wavelength (nm)) | ||
A. | n2 = 3 to n1 = 2 | I. | 410.2 |
B. | n2 = 4 to n1 = 2 | II. | 434.1 |
C. | n2 = 5 to n1 = 2 | III. | 656.3 |
D. | n2 = 6 to n1 = 2 | IV. | 486.1 |
The following diagram shown restriction sites in E. coli cloning vector pBR322. Find the role of ‘X’ and ‘Y’gens :