Answer:
The shoot of a grass seedling is enclosed in a sheath called the coleoptile, which grows straight upward if kept in the dark or illuminated uniformly from all sides. If it is illuminated from one side, it will curve toward the light as a result of differential growth of cells on opposite sides of the coleoptile.
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Answer;
Lipids is the correct answer.
Explanation;
-Lipids is among the four biological biomolecules, the others being proteins, carbohydrates and nucleic acids.
-Lipids are made up of fatty acids and glycerol and are composed of elements carbon, hydrogen , oxygen and they may also contain phosphorus, like in the case of phospholipids which are mainly components of the cell membranes.
-Lipids play major roles in the body which includes, energy source, structural compounds, insulation functions, among other functions.
A red blood cells, their function is to carry oxygen in blood