If the age of the middle layer of a rock sample is between 300 million years and 1 billion
years, which of the following could be the age of the lowermost layer?
O 2 million years to 5 million years
O 900 million years to 1 billion years
O
1.5 billion years to 2.5 billion years
O 800 million years to 950 million years
What is the answer?

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.

after a the power stroke, adp is released, but the cross-bridge formed is still in place. atp then binds to myosin, moving the myosin to its high-energy state, releasing the myosin head from the actin active site.

geologic time scale (for gradpoint) =)