Q: Plants, fungi, bacteria and archaea cells all have what feature that keeps them rigid that animal cells do not have? Choices: - cytoplasm - cell membrane - plastids - cell walls A:
cell walls

Q: How many valves are in the heart? Choices: - one - six - two - four A:
four

Q: Q: What type of fatty acids have bent chains? Choices: - cholesterol - saturated fatty acids - lipids - unsaturated fatty acids A:
A: unsaturated fatty acids

Question: Q: What forms a ketone when oxidized? Choices: - enzyme - aldehyde - carbolic acid - secondary alcohol A:
Answer: secondary alcohol

*Question*
Q: What is the name for a change in a single nucleotide in dna? Choices: - adaptation - spontaneous mutation - cell regeneration - point mutation A:
**Answer**
point mutation

Q: What type of pollution comes from sewage, storm drains, septic tanks, boats, and runoff from yards? Choices: - collective - urban - social - municipal A:
municipal