MCQ
Reptiles were dominant during ......... period.
- APermian
- BCretaceous
- CCanubran
- DOligocene
Explanation:
Cretaceous period was the last and the longest segment of the mesozoic era. It lasted approx. 79 million years ago. During this time, reptiles were large in number and were dominant.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
$(a)\; DNA$ is negatively charged molecule and so it is loaded on gel towards the Anode terminal
$(b) \;DNA$ fragments travel along the surface of the gel whose concentration does not affect movement of $DNA.$
$(c)$ Smaller the size of $DNA$ fragment larger is the distance it travels through it.
$(d)$ Pure $DNA$ can be visualized directly by exposing UV radiation.
Choose correct answer from the options given below