input: OPTIONS:
- nitrogen
- warmth
- air
- water Now, answer this question: Q: What is needed by all known forms of life? A:
A:
output: water

Q: People with red hair usually have what type of skin? A:

OPTIONS:
- dark
- oily
- dry
- light

Answer: light

Problem: OPTIONS:
- avian and emphysema
- chronic and emphysema
- smoking and emphysema
- pneumonia and emphysema
Q: Q: What illnesses are caused by damage to the alveoli of the lungs? A:
Answer: pneumonia and emphysema

Problem:OPTIONS:
- noses
- pores
- lungs
- gills

Q: Small crustaceans exchange gases across thin areas of the cuticle; larger species have what to accomplish this? A:
****
A: gills

Q: What are the three most common protective devices? A:
OPTIONS:
- fuses , circuit breaks & surge claws
- tranistors, resistors & diodes
- fuses , fabrication breaks & surge protectors
- fuses, circuit breaks & surge protectors
fuses, circuit breaks & surge protectors

Q: When salinity and pressure increase, or when temperature decreases, what happens to water density? A:
OPTIONS:
- fluctuates
- drops
- stays the same
- increases

Answer:
increases