Answer:
yes A system can be also be a system
Slope
slōp/
noun
1.
a surface of which one end or side is at a higher level than another; a rising or falling surface.
a difference in level or sideways position between the two ends or sides of a thing.
synonyms: gradient, incline, angle, slant, inclination, pitch, decline, ascent, declivity, rise, fall, tilt, tip, downslope, upslope, grade, downgrade, upgrade
"the slope of the roof"
a part of the side of a hill or mountain, especially as a place for skiing.
synonyms: hill, hillside, hillock, bank, sidehill, escarpment, scarp; More
verb
1.
(of a surface or line) be inclined from a horizontal or vertical line; slant up or down.
synonyms: slant, incline, tilt; More
In amino acids, the carboxyl group acts as an acid.
Answer: Option B
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Explanation:
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The molecular formula of the carboxyl group is -COOH. It is composed of one carbon atom bonded with oxygen atom and hydroxyl group.
During ionization process, it leads to the formation of two ions namely a positive ion called 
, whereas a negative ion called 
. Due to the formation of ions, which is nothing but a proton, the carboxyl group present in the amino acid act as an acid.
Answer:
proteins, carbohydrates, lipids and nucleic acids. thank me later
