Question

click the statement that best describes the role of each element in living organisms. nitrogen phosphorou sulfur done provides strength to bones and exoskeletons. gives strength to the protein keratin. is obtained by plants from bacteria in soil.

Explanation:

• For Nitrogen: Nitrogen is an essential element for plants, and a significant source of nitrogen for plants is from nitrogen - fixing bacteria in the soil. So the statement "is obtained by plants from bacteria in soil" best describes the role of nitrogen.
• For Phosphorus: Phosphorus is a key component in the structure of bones and exoskeletons (along with calcium in bones, and in exoskeletons like those of arthropods, phosphorus - containing compounds contribute to rigidity). So the statement "provides strength to bones and exoskeletons" best describes the role of phosphorus.
• For Sulfur: Sulfur is a component of the amino acid cysteine, which is part of the protein keratin. Disulfide bonds between cysteine residues in keratin give it strength. So the statement "gives strength to the protein keratin" best describes the role of sulfur.

Answer:

• Nitrogen: is obtained by plants from bacteria in soil.
• Phosphorus: provides strength to bones and exoskeletons.
• Sulfur: gives strength to the protein keratin.