Q: Q: What fibres are seen in some vertebrates that twitch at rates far faster than any human muscle? A:

OPTIONS:
- fast oxidative fibres
- slow twitch fibres
- fast glycolytic fibres
- skeletal muscle fibers

A: skeletal muscle fibers

input: OPTIONS:
- bark
- epidermis
- cuticle
- cell wall Now, answer this question: Q: What rigid layer surrounds the cell membrane of a plant cell? A:
A:
output: cell wall

Q: Out of the four ways that allele frequencies of a population can be changed, which way is caused by individuals leaving or joining the population? A:

OPTIONS:
- Allopatric speciation
- spontaneous mutation
- mass extinction
- gene flow

Answer: gene flow

Problem: OPTIONS:
- shells
- scales
- pores
- gills
Q: Q: What do ocean mollusks use to absorb oxygen from the water? A:
Answer: gills

Problem:OPTIONS:
- sugars
- solvents
- acids
- ethers

Q: What are composed of an oxygen atom that forms single bonds with two carbon atoms? A:
****
A: ethers

Problem:OPTIONS:
- amplification
- isolation
- insertion
- sublimation

Q: The direct conversion of a solid to a gas, without an intervening liquid phase, is called what? A:
****
A:
sublimation