Problem:OPTIONS:
- blood
- plasma
- myelin
- cell membrane

Q: What is the thin coat of phospholipids that surrounds the cell and controls what enters and leaves? A:
****
A: cell membrane

Q: What do you call the type of molecular signals that include insulin and that help regulate a number of biochemical processes? A:
OPTIONS:
- nerves
- acids
- enzymes
- hormones
hormones

Q: During sexual arousal what does the clitoris, vagina, and labia minora all engorge with? A:
OPTIONS:
- urine
- bacteria
- fluid
- blood

Answer: blood

Question: Q: What can be used to mechanically separate the two elements by attracting the iron filings out of the mixture and leaving the sulfur behind? A:
OPTIONS:
- centrifuge
- laser
- graduated cylinder
- magnet
Answer: magnet

input with options: Q: Around 1200 species of what broad animal group are currently at risk of extinction due to human activity? A:
OPTIONS:
- mammals
- reptiles
- amphibians
- birds
output: birds

Problem: OPTIONS:
- sediment
- volcanic activity
- debris
- erosion
Q: Q: Platforms, arches, and sea stacks are all landforms created by what? A:
Answer:
erosion