Fact 1: Cells secrete acids and bases to maintain the proper pH for enzymes to work. Fact 2: Enzymes help to break down proteins so that the bacteria can do their thing better. Given the two facts above, why do cells secrete acids?

OPTIONS:
- Make money
- resistance activities
- allow growth
- Plant growth is reduced
- Break down proteins
- Hurt things
- increases a body's strength
- Help friends

Answer: Break down proteins

Fact 1: Operating an automobile usually requires fossil fuels. Fact 2: Fossil fuels are a finite resource. Given the two facts above, what powers most automobiles? ?

OPTIONS:
- Sunlight.
- A finite resource.
- Natural gas.
- an engine
- energy of moving objects
- Water
- a hydraulic system
- transportation technology

Answer: A finite resource.

Fact 1: Smell is used for finding food by some animals. Fact 2: Smell receptors, nerve tissue that picks up smells, are located in the lining of the nose. Given the two facts above, receptors in the lining of the nose are:?

OPTIONS:
- heat or cold
- larger than the nose
- tastebuds
- used to find food
- insect
- barrel-shaped
- segmented
- messengers

Answer: used to find food

Fact 1: Adult worms go through a major transformation to develop reproductive organs. Fact 2: After about a week the larvae leave the nodules and continue to develop into adult worms. Given the two facts above, what leave the nodules and continue to transform until having reproductive organs?

OPTIONS:
- expelled
- seeds
- plants
- Flowers
- larvae
- chickens
- alpacas
- animals

Answer:
larvae