The experimental group is the group you change from the normal. the fertilizer group is experimental
All of the above are correct.
Answer:
a <u>Substitution point</u> mutation changes one base in the genetic code. Only one <u>nucleotide</u> may or may not be affected. An insertion or deletion causes a <u>frameshift</u> mutation which affects all the amino acids following the mutation.
Explanation:
A: In a lab a scientist measures the height of roses that received different fertilizers.
An experiment must include variables. The other three are just measurements, but since the scientist is varying the types of fertilizers used, this better describes an experiment. It is also done in a controlled environment (in a lab) which helps to eliminate other uncertainties.
B. atmosphere since the atmosphere is made up of o2, co2 (a greenhouse gas) and nitrogen. those are the primary elements
