Q: What is the layer of electrons that encircle the nucleus at a distinct energy level called? A:

OPTIONS:
- molecular shell
- vortex shell
- ions shell
- electron shell

Answer: electron shell

Problem: OPTIONS:
- exhibit
- illuminating
- peculiar
- courtship
Q: Q: What type of behaviors are triggered by pheromones in moths? A:
Answer: courtship

Problem:OPTIONS:
- tendency frequency
- combination frequency
- radio frequency
- wave frequency

Q: What are waves that pass a fixed point in a given amount of time called? A:
****
A: wave frequency

Q: As with other organic compounds that form hydrogen bonds, water solubility of amines is reflected in the length of what? A:
OPTIONS:
- hydrocarbon bonds
- complex carbohydrates
- nuclei chains
- carbon chains
carbon chains

Q: Birds have a relatively large heart and a rapid what? A:
OPTIONS:
- lifespan
- blink rate
- digestive process
- heart rate

Answer: heart rate

input with options: Q: Once classified as plants, fungi have chitin rather than cellulose in what cell structures? A:
OPTIONS:
- platelets
- cell ridges
- mitochondria
- cell walls
output:
cell walls