Fatty acids are the basic unit of which macromolecules?
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a. proteins
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b. lipids
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c. carbohydrates
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d. nucleic acids

B. Lipids

Explanation:

Lipids, popularly called fats, are insoluble in water consisting of several substances, including fatty acids. Fatty acids are carboxylic acids with hydrocarbon chains, classified by carbon chain length (short, medium and long-chain), the presence and number of double bonds (saturated and unsaturated) and the configuration of double bonds (cis and trans). Lipids, are composed of a series of substances that play different roles in the body and whose main characteristic is insolubility in water.

answer: angiosperms

dicots

angiosperms are highly evolved plants, they produce seeds which are enclosed within in a carple. these are the largest group of plants on earth. they include trees, shrubs, herbs and small flowering plants. angiosperms exhibit a flowering stage in their life cycle. the flower serves the function of reproduction and fruit formation in majority of angiosperms. dicot is the term used to describe flowering plants that have two seed leaves. dicots are plants which develop seeds which split into two parts called cotyledons. each cotyledon contains one embryo.

here, a small purple flower development indicates that the plant belongs to angiosperms and having two embryonic leaves indicates it belongs to dicots.