Question

few living organisms require raw materials and a constant source of energy.
cells maintain life through the breakdown of molecules and energy by chemical and physical processes.
animals use energy obtained directly from the sun and chemicals obtained from plants, other animals, air, and water.
cells do not require energy to change molecules from one form to another.
plants get the raw materials they need for life processes entirely from the air.
2 multiple choice 1 point
the process by which living organisms maintain a fairly constant internal environment despite changes in the external environ known as ______.
metabolism
biology
homeostasis
chemistry
evolution

Explanation:

For the first set of options:

1. All living organisms need raw materials and energy, so the first option is wrong.
2. Cells sustain life via chemical/physical breakdown of molecules and energy use, this is correct.
3. Animals get energy indirectly from the sun (via plants), not directly, so this is wrong.
4. Cells need energy to rearrange molecules, so this is wrong.
5. Plants also need water and nutrients from soil, not just air, so this is wrong.

For question 2:

• Metabolism is the sum of chemical reactions in organisms, not internal stability.
• Biology is the study of living things, not the process described.
• Homeostasis is the process of maintaining a stable internal environment despite external changes, which matches the definition.
• Chemistry is the study of matter, not the biological process.
• Evolution is the change of species over time, unrelated to internal stability.

Answer:

First correct option: Cells maintain life through the breakdown of molecules and energy by chemical and physical processes.
Question 2 correct option: homeostasis