Answer:
A signal is sent from a nerve cell to a muscle cell
Explanation:
I just took this test and this was the correct answer.
Any change or random error in a DNA sequence is called a mutation.
Correct answer - A.
Why? - A nucleotide consists of a sugar molecule (deoxyribose in DNA) attached to a phosphate group and a nitrogen-containing base. The bases used in DNA are adenine (A), cytosine (C), guanine (G), and thymine (T).
Info:
Well, I do not know where you got that information from, but, it is true. Physics is a branch of science that studies something that is quite far from biology. Chemistry though, shares a lot of common studies though, and many times they depend on each other.
_______________________________________________
Comparison:
Physics: studies the behaviour of the universe, to keep it simple.
Chemistry: it's the study of matter and their properties/interactions.
Biology: studies life.
As you can see, the studies of physics cannot be used frequently while studying biology. But, the study of matter can really be helpful to the study of life because they're really related.
Hope it helped,
BioTeacher101