input: OPTIONS:
- pathogen of mucus
- discharge of mucus
- amoeba of mucus
- cocoon of mucus Now, answer this question: Answer the following question given this paragraph: Q: What does the clitellum secrete, while the sperm received are stored temporarily? A:
A:
output: cocoon of mucus

Answer the following question given this paragraph: In the absence of a net force, objects move in a straight line. If they turn that is, if their velocity changes, even only in direction there must be an applied force. Forces which cause objects to turn around continuously in a circle are known as centripetal forces. When an object moves in a circle its velocity at any particular instant points in a direction tangent to the circle. The acceleration points towards the center of the circle, and so does the force acting on it. This is only natural, when you think about it if you feel a force pushing you towards your left as you walk forward, you will walk in a circle, always turning left. Q: Forces which cause objects to turn around continuously in a circle are known as? A:

OPTIONS:
- frictional forces
- tension forces
- hydrodynamic forces
- centripetal forces

Answer: centripetal forces

Problem: OPTIONS:
- nuclear fuel
- biofuel
- timber
- fossil fuels
Q: Answer the following question given this paragraph: Power plants and factories account for more than a quarter of fossil fuel use. Power plants burn fossil fuels to generate electricity. Factories burn fossil fuels to power machines. Q: What do power plants burn to generate electricity? A:
Answer: fossil fuels

Problem:OPTIONS:
- rust
- spontaneous combustion
- steel oxide
- iron oxide

Answer the following question given this paragraph: The sparks from a steel grinder are molten iron. The iron reacts with oxygen to form iron(III) oxide. Q: When sparks from a steel grinder react with oxygen, what do they form? A:
****
A: iron oxide

Answer the following question given this paragraph: Triglycerides function as a long-term storage form of energy in the human body. Because of the long carbon chains, triglycerides are nearly nonpolar molecules and thus do not dissolve readily in polar solvents such as water. Instead, oils and fats are soluble in nonpolar organic solvents such as hexane and ethers. Q: What substances function as a long-term energy store in the human body and possess long carbon chains that prevent dissolving in water? A:
OPTIONS:
- hydrocarbons
- steroids
- nanoparticles
- triglycerides
triglycerides

Answer the following question given this paragraph: The other ammonium ions are changed into nitrogen gas by denitrifying bacteria. Q: The other ammonium ions are changed into nitrogen gas by what? A:
OPTIONS:
- fluctuations bacteria
- fungi
- accompanying bacteria
- denitrifying bacteria

Answer:
denitrifying bacteria