Hi all!
Pls help me in these 2 simple questions.
Thanks in advance!

The rate at which molecules water and oxygen can enter a cell is determined by the-

Which technically is nasa developing that will astronauts reach mars

The table shows dates and appearance of index fossils. which rock layers can be dated most precisely? a) a layer containing both a fossil 4 and a fossil 3 b) a layer containing both a fossil 2 and a fossil 3 c) a layer containing both a fossil 1 and a fossil 4 d) a layer containing both a fossil 1 and a fossil 2