2. What happens to the nucleus of an atom when the atom is involved in a chemical reaction? *
O It gains or loses electrons.
O It gains or loses protons.
O It gains or loses neutrons.
0 It does not change.
Lant

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 best describes the scientific method? a. a path of clearly defined steps that must be followed in a particular order b. a possible answer to a scientific question based on knowledge or research c. the recipe for how to conduct an experiment that must be followed precisely d. the process of hypothesis and testing through which scientific inquiry occurs

Nucleic acids offer variability because they contain alternate forms of genes called .