Problem: OPTIONS:
- 4
- 12
- 9
- 8
Q: Q: By how many weeks do all major organs start developing? A:
Answer: 8

Problem:OPTIONS:
- solution & function
- density & function
- Density and Structure
- structure & function

Q: Traditional classification of mammals are based on similarities in what two things? A:
****
A: structure & function

Q: What chemical element helps forms strong bones and teeth in humans? A:
OPTIONS:
- iron
- potassium
- magnesium
- calcium
calcium

Q: How many types of simple machines are there? A:
OPTIONS:
- ten types
- three types
- two types
- six types

Answer: six types

Question: Q: Which zone is located below 200 meters from the surface? A:
OPTIONS:
- epipelagic
- observable zone
- mesopelagic
- aphotic zone
Answer: aphotic zone

input: OPTIONS:
- fluids
- blood
- nutrients
- gases Now, answer this question: Q: What does the respiratory system exchange between the body and the outside air? A:
A:
output:
gases