Problem: OPTIONS:
- melted
- eroded
- decayed
- rusted
Q: Q: A rusty bike has been left outside in damp weather too many times, so the iron in the metal parts have? A:
Answer: rusted

Problem:OPTIONS:
- bile ducts
- stomach cilia
- alveoli
- intestinal villi

Q: The mechanical and digestive processes have one goal: to convert food into molecules small enough to be absorbed by the epithelial cells of what? A:
****
A: intestinal villi

Q: What do you call a substance that cannot be separated into smaller pieces, which is also defined by the number of protons it has? A:
OPTIONS:
- electrol
- molecule
- atom
- element
element

Q: Birds adapted wings and weathers for flight during what process? A:
OPTIONS:
- migration
- variation
- emergence
- evolution

Answer: evolution

Question: Q: What consists of one or two closed loops through which current can flow? A:
OPTIONS:
- thermal reaction
- magnetic poles
- cooling circuit
- electric circuit
Answer: electric circuit

input: OPTIONS:
- acids
- sugars
- proteins
- fats Now, answer this question: Q: What is an example of a biochemical lipid that contributes to weight gain? A:
A:
output:
fats