Problem: OPTIONS:
- .350 million
- 500 million
- .250 million
- 600 million
Q: Q: How many years ago may the earliest fungi have evolved? A:
Answer: 600 million

Problem:OPTIONS:
- evolution
- symbiosis
- immigration
- extinction

Q: What does interspecific competition between species often lead to? A:
****
A: extinction

Q: What process is the opposite of nitrogen fixation? A:
OPTIONS:
- digestion
- respiration
- percolation
- denitrification
denitrification

Q: What is given off from plants and taken in by animals? A:
OPTIONS:
- methane
- sulfur
- nitrogen
- oxygen

Answer: oxygen

Question: Q: When what common element forms single bonds with other atoms, the shape is tetrahedral, and when its atoms form a double bond, the shape is planar? A:
OPTIONS:
- oxygen
- hydrogen
- silicon
- carbon
Answer: carbon

input: OPTIONS:
- a little hot
- cool
- cold
- extremely high Now, answer this question: Q: What kind of surface temperature is found on venus? A:
A:
output:
extremely high