Problem: OPTIONS:
- nitrogen
- movement
- carbon
- oxygen
Q: Q: Anaerobic respiration takes place without what? A:
Answer: oxygen

Problem:OPTIONS:
- protoplasm
- epidermis
- cell wall
- nucleus

Q: Where in the cell does transcription occur? A:
****
A: nucleus

Q: Potential differences from various voltage sources are necessary in order to create electrical fields, which result in what flow of charge? A:
OPTIONS:
- voltage
- output
- wattage
- current
current

Q: What are chemical bonds between atoms of nonmetals that share valence electrons called? A:
OPTIONS:
- electron bonds
- ionic bonds
- gravitational bonds
- covalent bonds

Answer: covalent bonds

Question: Q: As roots grow longer they will always do what? A:
OPTIONS:
- change direction
- get larger
- get thicker
- grow downward
Answer: grow downward

input: OPTIONS:
- stratosphere
- air
- troposphere
- clouds Now, answer this question: Q: Where do lightnings build up? A:
A:
output:
clouds