How the cancer is diagnosed?

Doctors normally need to do a biopsy to diagnose cancer :)

A biopsy is a procedure in which a doctor will give a sample of client's tissue to a Pathologist who examines it with a microscope and runs tests based on the sample.

If you have a symptom or a screening test result that suggests cancer, your doctor must find out whether it is due to cancer or some other cause. The doctor may start by asking about your personal and family medical history and do a physical exam.

Explanation:

hope this helps

have a great day/night

genetic variation will increase because of a new habitat and food source.

explanation:

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.