What is the main driving force that directly causes air to flow in and out of the respiratory system? hint: it is the same force that creates blood flow?

Which mantle is under the crust the upper mantle or the lower mantle i think it's upper let me know if i'm right

How many years would it take the atlantic ocean to grow 500 centimeters? show your work.

Recombinant dna (rdna) creates offspring which are genetically identical to the parent is the process of breeding only organisms with desirable traits involves the removal of the nucleus of a cell combines genes from organisms of different species in a lab