Q: Q: The most common carbon atoms have six protons and six neutrons in their what? A:

OPTIONS:
- ribosomes
- neuron
- membrane
- nuclei

A: nuclei

input: OPTIONS:
- liquid exchange process
- helium exchange process
- transit exchange process
- gas exchange process Now, answer this question: Q: What do all respiratory diseases affect? A:
A:
output: gas exchange process

Q: How can you calculate the density of matter? A:

OPTIONS:
- by subtracting mass from volume
- by multiplying its mass by its volume
- by dividing its volume by its mass
- by dividing its mass by its volume

Answer: by dividing its mass by its volume

Problem: OPTIONS:
- association
- dissociation
- assimilation
- habituation
Q: Q: Learning to get used to something after being exposed to it for a while is associated with what kind of learning? A:
Answer: habituation

Problem:OPTIONS:
- carboniferous
- permian
- ordovician
- cambrian

Q: The first period of the paleozoic era was called what? A:
****
A: cambrian

Problem:OPTIONS:
- low thyroid levels
- high fat diets
- high serotonin levels
- low serotonin levels

Q: What according to scientists is the major cause of depression? A:
****
A:
low serotonin levels