Question: Q: The separation of compounds on the basis of their solubilities in a given solvent is known as what? A:
OPTIONS:
- nuclei crystallization
- simplest crystallization
- separate crystallization
- fractional crystallization
Answer: fractional crystallization

input with options: Q: What process takes place when echinoderms release their gametes into the water? A:
OPTIONS:
- migration
- stimulation
- isolation
- fertilization
output: fertilization

Q: Q: Composed largely of the polysaccharide chitin, the exoskeleton provides an effective barrier defense against most what? A:

OPTIONS:
- parasites
- white blood cells
- vaccines
- pathogens

A: pathogens

input: OPTIONS:
- 600
- 400
- 500
- 250 Now, answer this question: Q: How many millions of years ago did pangaea begin breaking apart? A:
A:
output: 250

Q: What describes how close an estimate is to a known standard? A:

OPTIONS:
- diversity
- frequency
- precision
- accuracy

Answer: accuracy

Q: Q: Due to the __________ nature of the lipids that make up cell membranes, polar molecules (such as water) and ions cannot easily diffuse across the cell membrane. A:

OPTIONS:
- hydrophylic
- saturated
- catalytic
- hydrophobic

A:
hydrophobic