Q: Something that has all of the characteristics of life is considered to be what? Choices: - molecule - organism - ecosystem - alive A:
alive

Q: The production of light by living things is called what? Choices: - apoptosis - attenuation - bio-glow - bioluminescence A:
bioluminescence

Q: Q: How many chambers are in the heart? Choices: - two - eight - five - four A:
A: four

Question: Q: During what in the small intestine do rings of smooth muscle repeatedly contract and then relax? Choices: - mitosis - contraction - compression - segmentation A:
Answer: segmentation

*Question*
Q: The energy changes in what reactions are enormous compared with those of even the most energetic chemical reactions, and they result in a measurable change of mass? Choices: - molecular reaction - metabolic reaction - methane combustion - nuclear reactions A:
**Answer**
nuclear reactions

Q: Which factor often changes a protein from an inactive form to an active form? Choices: - oxygen groups addition - lipid groups addition - nitrogen groups addition - phosphate groups addition A:
phosphate groups addition