Problem:OPTIONS:
- predators
- raptors
- prehistoric
- flightless

Q: The ostrich, kiwi, rhea, cassowary, and moa are examples of what kind of birds? A:
****
A: flightless

Q: What is the plasma membrane formed by? A:
OPTIONS:
- a cytoplasm bilayer
- cholesterol byproduct
- single lipid layer
- a phospholipid bilayer
a phospholipid bilayer

Q: During what time period did poor air quality become a problem? A:
OPTIONS:
- Chernobyl disaster
- coal industry boom
- second world war
- industrial revolution

Answer: industrial revolution

Question: Q: The entry of food into the esophagus marks the beginning of the esophageal phase of deglutition and the initiation of this? A:
OPTIONS:
- relaxation
- digestion
- propagation
- peristalsis
Answer: peristalsis

input with options: Q: What is the only human cell with flagella? A:
OPTIONS:
- egg
- saliva
- Feces
- sperm
output: sperm

Problem: OPTIONS:
- dendrites
- cell walls
- synapses
- long, threadlike extensions
Q: Q: Which part of the nerve cell helps transmit nerve impulses? A:
Answer:
long, threadlike extensions