Problem:OPTIONS:
- Salt Water
- toxins
- Gold
- sweating
- the skin
- Steel
- Plastic
- cold air

Fact 1: An electrical insulator slows the transfer of electricity. Fact 2: Plastic is an insulator of electricity. Given the two facts above, what slows the transfer of electricity?
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A: Plastic

Problem:OPTIONS:
- maps
- heat energy
- microns
- Energy
- microbes
- microtubules
- sensory neurons
- Chemical energy

Fact 1: Flagella help prokaryotes move. Fact 2: Cilia and flagella are composed of microtubules. Given the two facts above, what help prokaryotes move?
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A: microtubules

Problem:OPTIONS:
- rays or beams
- Plasma cells
- Cooking
- an electric stove
- Petri dish
- deal
- phlange
- evaporation

Fact 1: Plasma cells are activated B cells that secrete antibodies. Fact 2: Antibodies kill bacteria. Given the two facts above, what kills bacteria?
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A: Plasma cells

Problem:OPTIONS:
- migrate
- expand
- A computer
- Most plants
- allow growth
- reproduce
- contract
- constrict

Fact 1: Cells are programmed to divide only a set number of times. Fact 2: Cells reproduce asexually, by dividing. Given the two facts above, cells are programmed to _ only a set number of times.?
****
A:
reproduce