Q: Q: During diastole, what happens to the elastic walls of the arteries? A: | OPTIONS:
- they expand
- they become hardened
- they evolve
- they snap back
A: they snap back

Q: Q: What is the term for the gas in smog that can damage plants? A: | OPTIONS:
- dioxide
- carbon
- sulphur
- ozone
A: ozone

Q: Q: Which chromosome is associated with cri du chat syndrome? A: | OPTIONS:
- collagen 5
- genome 5
- spore 5
- chromosome 5
A: chromosome 5

Q: Q: Nearly all protists exist in some type of aquatic environment, including freshwater and marine environments, damp soil, and even snow. several protist species are parasites that infect animals or plants. a few protist species live on dead organisms or their wastes, and contribute to what? A: | OPTIONS:
- greenhouse gas
- habitat loss
- spontaneous mutation
- their decay
A: their decay