Question

name: biol 105 exam 2 date: 14. the ultimate source of energy for most living organisms is: a. geothermal energy. b. algae. c. wind. d. sunlight. 15. an organism that makes its own food by photosynthesis is called a(n): a. autotroph. b. heterotroph. c. phototroph. d. mycotroph. 16. the energy of movement is ______ energy. a. chemical b. mechanical c. potential d. kinetic 17. energy cannot be: a. harvested or transferred, but it can be created. b. created or destroyed, but it can be transformed. c. transformed or destroyed, but it can be transferred. d. transferred or avoided, but it can be harvested. 18. the principle that energy is neither created nor destroyed, but can change form, is referred to as the: a. conservation of energy. b. entropy. c. kinetics. d. energetics. 19. the energy in our food is contained within the: a. fat molecules. b. chemical bonds of biological molecules. c. carbon atoms of molecules. d. nucleus of carbon atoms. 20. if your car runs out of gas, the energy that was contained in the gas has: a. increased and changed form. b. been converted to several other forms of energy. c. been destroyed. d. created new energy.

Explanation:

1. Sunlight is the primary energy source for most life via photosynthesis.
2. Autotrophs produce their own food through photosynthesis.
3. The energy of movement is kinetic energy.
4. Energy cannot be created or destroyed, only transformed or transferred (law of conservation of energy).
5. The principle that energy is neither created nor destroyed but can change form is the conservation of energy.
6. The energy in food is stored in the chemical bonds of biological molecules.
7. When a car runs out of gas, the energy in the gas has been converted to other forms of energy due to the law of conservation of energy.

Answer:

1. d. sunlight
2. a. autotroph
3. d. kinetic
4. c. transformed or destroyed, but it can be transferred
5. a. conservation of energy
6. b. chemical bonds of biological molecules
7. b. been converted to several other forms of energy