Questions

Answers B and C belong to quality management, and answer D was formulated by Elizabeth Duffy and suggested that we all try to adjust our lives so that we have a dynamic balance (homeostasis) between challenge and relaxation. Kerstner, Chapter 18

In chemistry, Weak bonds are those forces of attraction that, do not take a large amount of energy to break.

For example, hydrogen bonds are broken by energies in the order of 4 - 5 kcal/mol.

Ionic bonds, hydrogen bonds and van der Waals interactions are considered weak bonds.

Weak bonds are transient and easily reversible.

The color of giraffe's tongue is purple or bluish to prevent it from sunburn as it lives in tropical regions.

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Metabolism (from Greek: μεταβολή metabolē, "change") is the set of life-sustaining chemical transformations within the cells of organisms. The three main purposes of metabolism are the conversion of food/fuel to energy to run cellular processes, the conversion of food/fuel to building blocks for proteins, lipids, nucleic acids, and some carbohydrates, and the elimination of nitrogenous wastes.

In brief, the chemical processes that occur within a living organism in order to maintain life is called metabolism.