For the first question, I would say a line graph. And the one about the human heart, I need some more information.
The answer is B.
I think its safe to assume we all have had a cup of ice water. The ice always floats at the surface of the water.
Answer: scientific theory is an explanation of observations or events that is based on knowledge gained from many observations or events.
Explained in greater detail, each gene resides at a specific locus (location on a chromosome) in two copies, one copy of the gene inherited from each parent. The copies, however, are not necessarily the same. When the copies of a gene differ from each other, they are known as alleles.
