I think two are stem cell research and cloning
Any radiation of any kind can cause cancer. So many things today can be connected to cancer that making the assumption that radiation for cervical cancer causes liver cancer is plausible.
Answer:
it had more than one lens
Explanation:
The first compound microscope had more than one lens located in the objective and eyepiece. Both the eyepiece lens and objective lens are convex. The compound microscope is used to magnify specimen at high magnification (40 - 1000x), which is achieved by the combined effect of the two sets of lenses.
