input: OPTIONS:
- absorbs extracellular materials
- repels extracellular materials
- destroys extracellular materials
- provides a barrier Now, answer this question: Q: How does a cell's membrane keep extracellular materials from mixing with it's internal components? A:
A:
output: provides a barrier

Q: What class of animals, translated as "head foot", includes octopuses, squids, cuttlefish, and nautilus? A:

OPTIONS:
- mollusks
- crustaceans
- bivalves
- cephalopods

Answer: cephalopods

Problem: OPTIONS:
- excretory
- integumentary
- cardiac
- respiratory system
Q: Q: What system of the body is generally responsible for breathing? A:
Answer: respiratory system

Problem:OPTIONS:
- predatory
- Grazing
- contain
- territorial

Q: What is the term for animals that defend their area? A:
****
A: territorial

Q: The orbicularis oris is a circular muscle that moves the lips, and the orbicularis oculi is a circular muscle that does what? A:
OPTIONS:
- pressure the eye
- opens the eye
- moisturizes the eye
- closes the eye
closes the eye

Q: The milky way galaxy is which shape type of galaxy? A:
OPTIONS:
- cylindrical
- spherical
- helical
- spiral

Answer:
spiral