Why is a hypothesis an important part of the scientific process? it provides a definitive explanation of the natural phenomena for other scientists. it can be proved absolutely correct through experimentation. it is a tentative explanation that can be tested and may provide scientific theories or laws. it can never be proved to be incorrect.

25) a student takes four samples of a white crystalline solid and places each in a well plate. on top of each sample, she carefully places 20 drops of clear mystery liquids a, b, c and d. her results for each well are: liquid a: the solid dissolves quickly. liquid b: the solid appears unchanged. liquid c: a brownish colored liquid is produced. liquid d: fizzing occurs and the well becomes warmer. in which well does a physical change occur?

Astudent is looking through a microscope at some cells of an onion root tip. many of these cells are undergoing division since the root tip grows quickly and requires more cells. which cell most recently underwent metaphase? w x y z

Which was most likely an effect on society that resulted from improvements in blood handling during world war i and world war ii?