How is an isotope different from the standard form of a chemical element?
A
It has a different number of protons.
B
It has a different number of neutrons.
с
It has a different number of electrons.
D
It has a different number of positrons.

Read each description below and determine to which stage of sleep each pertains. then click and drag each box into the appropriate category below.

What is the best conclusion based on this data? the hypothesis was not supported because the data indicated that fertilizing plants does not improve plant growth. the hypothesis was supported; to get the best growth, use 5 milliliters of fertilizer per plant. the hypothesis was not supported; the data indicated that too much fertilizer can inhibit plant growth. the hypothesis was supported; to get the best growth, use 15 milliliters of fertilizer per plant.

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