How is the male reproductive system different from other body systems?

Look at the following answer choices and determine which belongs in the both category. testable, can be disproven explains natural phenomena, has evidence to support it prediction, tentative, one or more scientists working together well established, many different scientists working independently, highly reliable

How do you date a sample of rock that you suspect as being one of the earliest on earth

Mineral rich water heated by newly found oceanic crust escapes through cracks in the ocean floor called