Answer:
The controlled variable in an experiment could be the amount of water.
Explanation:
The experiment is to see how the amount of water changes the growth of the same plant type. The amount of water is what we are controlling, to see if we get different results from the plant growth.
Answer:
True
Explanation:
A cation is a positively charged atom (whereas an anion is negatively charged).
Electrons are negatively charged. If an atom loses negative particles, it'll become positive.
Group 1 and 2 elements are metals. Metals lose electrons to form ions, thus metals become cations. Metals become positively charged.
They will lose all of their valence electrons to become an ion. Group numbers tell you the valance electrons of an atom.
Group 1 elements have 1 valence, which they lose to become a cation.
Group 2 elements have 2 valances, which they lose to become a cation.
Answer:
Amino acids are molecules used to build proteins. All amino acids have a central carbon atom surrounded by a hydrogen atom, a carboxyl group (COOH), an amino group (NH2), and an R-group. It is the R-group or side chain that makes each of the 20 amino acids unique.
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Answer:
New cells with identical DNA are created through cell division.
Explanation:
