Input: Answer this question:
What two gases make up most of the Earth's atmosphere?
OPTIONS:
- Hydrogen and oxygen
- Hydrogen and nitrogen
- Oxygen and carbon dioxide
- Oxygen and nitrogen
Answer: Oxygen and nitrogen

*Question*: Which of the following can provide the human body with long-term immunity against some diseases? OPTIONS:
- antibiotics
- vitamins
- vaccines
- red blood cells
*Answer*: vaccines

question:
A fox gave birth to an offspring that had a better sense of hearing than most foxes. How could this small change most likely result in descendants that are different from the original fox?
OPTIONS:
- Foxes that have a better sense of hearing may mutate more frequently than other foxes.
- Foxes that have a better sense of hearing may be hunted more frequently.
- Over time, descendants of this fox may hear and hunt prey better than other foxes.
- Over time, descendants of this fox may become extinct.

answer:
Over time, descendants of this fox may hear and hunt prey better than other foxes.

[Q]: Which group of organisms would all be found living in a tropical rain forest?
===
OPTIONS:
- Lizards, insects, cacti, kangaroos
- Vines, palm trees, tree frogs, monkeys
- Evergreens, moose, weasels, mink
- Lichens, mosses, caribou, polar bears
****
[A]: Vines, palm trees, tree frogs, monkeys

question below:
The heart, veins, arteries, and capillaries make up which organ system?
OPTIONS:
- reproductive
- muscular
- excretory
- circulatory
answer below:
circulatory

Input: Answer this question:
Which model is used by scientists to determine the properties of elements?
OPTIONS:
- a Punnett square
- the Periodic Table
- a pedigree chart
- the rock cycle
Answer:
the Periodic Table