Keystone species ; this is a species whose presence is critical to the composition and integrity of the community
DNA Ligase enzyme.
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It function attributed of the Golgi Complex, also known as the Golgi Body.
The correct answer is phospholipid / lipids.
All of the pairs represent the combination of macromolecules with their basic units.
In the case of lipids, basic building blocks are free fatty acids, not phospholipids. Phospholipids are a class of lipids composed of two hydrophobic fatty acid "tails" and a hydrophilic "head" consisting of a phosphate group which are joined together by a glycerol molecule.
