Warm air A.
is denser than cold air
B.
is found in a high pressure areas
C.
is less dense that cold air
D.
stays near the ground

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?

2. does the given statement describe a step in the transformation of the graph off(x) = x2 that would result in the graph of g(x) = -5x + 2)? a. the parent function is reflected across the x-axis. o yes nob. the parent function is stretched by a factor of 5. yes noonc. the parent function is translated 2 units up. o yes

Ascientific idea becomes valid when it is what?