Which of the following is a change of state of a substance? A. A piece of metal becomes warm in sunlight
B. Rain falls on dry ground and is quickly absorbed
C. A large piece of paper is cut into eight strips
D. Water placed in the freezer forms ice cubes

Which statement about dna replication is true? a. eukaryotes only have one circular chromosome that unwinds at multiple locations. b. eukaryotes can only replicate one segment of a chromosome at a time. c. prokaryotes can only replicate their single circular chromosome in the nucleus. d. prokaryotes only have one origin of replication to initiate replication.

What environmental cues and landmarks do the geese use to determine the timing and direction of their migration over the mountains? how do they find their way?

In each transformation of energy , some energy what?