Q: What causes the endometrium to thicken during a menstrual cycle? A:
OPTIONS:
- testosterone
- blood
- ovulation
- estradiol

Answer: estradiol

Question: Q: The sun and all objects held by it's gravity make up the? A:
OPTIONS:
- milky way
- planet
- atmosphere
- solar system
Answer: solar system

input with options: Q: The number of valence electrons determines variation of what property in nonmetals? A:
OPTIONS:
- permeability
- density
- turbidity
- reactivity
output: reactivity

Q: Q: The amount of what entering the eyes helps control the biological clock? A:

OPTIONS:
- air
- energy
- heat
- light

A: light

input: OPTIONS:
- ambers
- chelicides
- maxillae
- chelicerae Now, answer this question: Q: Chelicerata are know for their first pair of appendages, also know as what? A:
A:
output: chelicerae

Question: Q: What term is used to describe a simple diagram that shows one way energy flows through an ecosystem? A:
OPTIONS:
- water cycle
- food pyramid
- fuel chain
- food chain
Answer:
food chain