Problem: OPTIONS:
- presbyopia
- hyperopia
- myopia
- astigmatism
Q: Q: Unevenness or asymmetry in the focus of the eye describes what visual defect? A:
Answer: astigmatism

Problem:OPTIONS:
- fluctuations
- particles
- isolation
- interactions

Q: Species distributions are a consequence of both ecological and evolutionary what? A:
****
A: interactions

Q: Gram-positive and gram-negative bacteria are distinguished by thickness of what? A:
OPTIONS:
- cell membrane
- cell weight
- cell length
- cell wall
cell wall

Q: Where did west nile first appear? A:
OPTIONS:
- Central America
- North Africa
- Southeast Asia
- north america

Answer: north america

Question: Q: An organism's unique role in the ecosystem is called its what? A:
OPTIONS:
- focus
- adaptation
- purpose
- niche
Answer: niche

input: OPTIONS:
- circulatory system
- excretory system
- urinary system
- digestive system Now, answer this question: Q: Which system consists of organs that break down food and absorb nutrients such as glucose? A:
A:
output:
digestive system