List I | List II | ||
---|---|---|---|
A | Mesozoic Era | I | Lower invertebrates |
B | Proterozoic Era | II | Fish & Amphibia |
C | Cenozoic Era | III | Birds & Reptiles |
D | Paleozoic Era | IV | Mammals |
The Mesozoic Era is known for the rise of birds and reptiles, so it corresponds to III.- The Proterozoic Era is characterized by the appearance of lower invertebrates, so it corresponds to I.- The Cenozoic Era is marked by the rise of mammals, so it corresponds to IV.- The Paleozoic Era is known for the emergence of fish and amphibians, so it corresponds to II.
Thus, the correct match is: A- III, B- I, C- IV, D- II
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 |