As ice melts A. hydrogen bonds are broken
B. water molecules become less tightly packed
C. the water becomes less dense
D. heat is released into the atmosphere

Acar traveld with an average speed of 60 miles per hour for 2 hours. how far did it travel

Natural selection changes allele frequencies because some survive and reproduce more successfully than others.

How did alexander fleming’s research solve a societal problem? he developed ways to treat inherited diseases. he advocated for regular hand washing to kill germs. he discovered a new type of medicine that could treat infections. he discovered the cause of mad cow disease, an emerging disease.