Problem:OPTIONS:
- hormones
- food
- ribosomes
- gene flow
- nectar
- Collagen
- Enzymes
- seeds

Fact 1: Nectar is used for attracting pollinators by plants. Fact 2: POLLINATION Pollination is essential for fruit production. Given the two facts above, what can be essential for fruit production?
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A: nectar

Problem:OPTIONS:
- live
- work
- move
- form
- grow
- growth
- Energy
- fusion

Fact 1: Flagella help prokaryotes move. Fact 2: Sperms have flagella. Given the two facts above, sperms can help prokaryotes what?
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A: move

Problem:OPTIONS:
- sunlight
- evaporative cooling
- gases
- Physical weathering
- water evaporation
- lower temperature thresholds
- exposure to cold
- fissures of hot, acidic water

Fact 1: Freezing causes a solid to form. Fact 2: Lower temperature thresholds are at freezing. Given the two facts above, what causes a solid to form?
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A: lower temperature thresholds

Problem:OPTIONS:
- UV rays
- Snow
- salt and water.
- Heat energy
- air cools
- kinetic energy
- Subzero temperatures
- Water expanding

Fact 1: Melting means changing from a solid into a liquid by adding heat energy. Fact 2: Ice Sculptures melt away. Given the two facts above, what causes ice sculptures to turn to liquid? ?
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A:
Heat energy