The arrows in the picture below show several ways heat is transferred from the Sun as it strikes sand on the surface of a beach. Which arrow shows convection? A.
1

B.
2

C.
3

D.
4

What do all macromolecules have in common with each other? oa. they all are formed from the same elements. ob. they all have major roles in cell membranesoc. they all act as catalysts in the body. od. they all have peptide bonds between carbon atoms.

What is the inability of an individual or a society to achieve a minimum standard of living known as ?

In which of the following relationships is one organism always benefited while the other organism is always harmed