What is the age of the oldest rock that has been found and dated? a) 3 billion years b) 3.5 billion years c) 4 billion years d) 4.5 billion years

15 ! come and answer! a(n) disease is caused by a pathogen and can spread among organisms. a infectious b noninfectious c toxic d contaminated

20. in humans, freckles are dominant to no freckles. trey has no freckles and his wife anna grace has freckles, but her dad doesn't. they want to know what percentage of their kids would look like trey. show a punnett square to support your answer.

Do you think the gene eef1 alpha1 supports cell theory? explain your response.