In what rock layer in the grand canyon would a scientist first find a fossil of a tetrapod

Which would be the most useful source of evidence to support mcneill's contention?

Iwill make you brainliest pleeze answer this fast i have to turn it in really soon brainliest promise easy question 6th grade ! a weather map shows a high pressure system with circles around it. what does this mean? a) an occluded front b) areas of equal altitude c) areas of equal pressure d) a stationary front

What is the difference between a scientific hypotheses and a scientific theory?