Answer:
(d) Cell wall
Explanation:
The cell wall is a structure located on the outside of the cell membrane in the cells of plants, bacteria, fungi, and algae. It is a resistant, tough and flexible layer, which has the vital function of supporting the osmotic pressure inside the cell, preventing the cell from lysis when water enters. Besides, it has the function of giving rigidity, support and defining the shape of the cell.
Answer:
tertiary structure
Interactions among the amino acid side chains within a single protein molecule determine the protein's tertiary structure. Tertiary structure is the most important of the structural levels in determining, for example, the enzymatic activity of a protein.
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Limestone is essential for the formation of petroleum reservoirs
Limestone is great for soil as due to its structure, it can buffer acidic chemicals in soil
It is useful in the prevention of explosions from mining that are caused from too much methane release
It is useful in mediating the effects of erosion the the environment
