Q: Q: Is sleep an active or inactive state in the brain? A:

OPTIONS:
- intense
- different
- inactive
- active

A: active

input: OPTIONS:
- twisting
- push
- lunging
- release Now, answer this question: Q: Muscle contraction requires repeated cycles of binding and what? A:
A:
output: release

Q: What is the total number of codons? A:

OPTIONS:
- 45
- 51
- 68
- 64

Answer: 64

Problem: OPTIONS:
- tertiary succession
- primary succession
- tropical succession
- secondary succession
Q: Q: What occurs when a former inhabited area gets disturbed? A:
Answer: secondary succession

Problem:OPTIONS:
- proteins
- tissue
- toxins
- offspring

Q: All living things are able to produce what? A:
****
A: offspring

Problem:OPTIONS:
- toxins
- absorb salts
- mercury
- excess salts

Q: Tissues of marine bony fishes gain what from their surroundings? A:
****
A:
excess salts