input: OPTIONS:
- swimmers
- cycle - feeders
- flagellators
- filter-feeders Now, answer this question: Answer the following question given this paragraph: Some animal-like protists use their "tails" to eat. These protists are called filter-feeders . They acquire nutrients by constantly whipping their tails, called flagellum , back and forth. The whipping of the flagellum creates a current that brings food into the protist. Q: Protists which use their tails to eat are called what? A:
A:
output: filter-feeders

Answer the following question given this paragraph: The atomic number defines the identity of an element. Q: The atomic number defines the identity of what? A:

OPTIONS:
- atomic reaction
- neutralized molecule
- periodic table
- element

Answer: element

Problem: OPTIONS:
- rivers
- ocean
- moon
- sun
Q: Answer the following question given this paragraph: The Sun is Earth's main source of energy. The Sun gives us both light and heat. The Sun changes hydrogen into helium through nuclear fusion. This releases huge amounts of energy. The energy travels to Earth mostly as visible light. The energy is carried through the empty space by radiation . We can use sunlight as an energy resource, called solar energy. Q: What celestial body is the earth's main source of energy? A:
Answer: sun

Problem:OPTIONS:
- mold
- ferns
- viruses
- bacteria

Answer the following question given this paragraph: Life on Earth began about 3.5 to 4 billion years ago. The first life forms were single-celled organisms similar to bacteria. The first multicellular organisms did not appear until about 610 million years ago. Many different types of organisms evolved during the next ten million years, in an event called the Cambrian Explosion . This sudden burst of evolution may have been caused by some environmental changes that made the Earth's environment more suitable for a wider variety of life forms. Q: What were the first life forms found on earth similar to? A:
****
A: bacteria

Answer the following question given this paragraph: Ion drives have low thrust but high efficiency. They have already been used on several space missions, including NASA's Deep Space 1spacecraft and Japan'sHayabusa asteroid sampling probe. Source: Photo courtesy of NASA,http://commons. wikimedia. org/wiki/File:Ion_Engine_Test_Firing_-_GPN2000-000482. Q: Ion drives have low thrust but high what? A:
OPTIONS:
- power
- acceleration
- tolerance
- efficiency
efficiency

Answer the following question given this paragraph: As you age, you might start noticing pain in your knees or elbows. These are examples of joints. Joints are the part of the skeletal system that connect your bones. Joint pain is a common problem as people age. Q: Knees and elbows are examples of what part of the skeletal system? A:
OPTIONS:
- cartilage
- muscles
- nerves
- joints

Answer:
joints