Problem:OPTIONS:
- Leptospirosis
- produce offspring
- allow growth
- sexual reproduction
- metabolic reaction
- peachleaf willow
- rapid expansion
- Plant reproduction

Fact 1: Fertilization occurs when a sperm and an egg fuse to form a diploid zygote. Fact 2: Sexual reproduction requires formation of gametes, followed by fertilization. Given the two facts above, what involves a sperm and egg fusing to form a diploid zygote?
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A: sexual reproduction

Problem:OPTIONS:
- layers of fat
- a lot of human deaths
- Walls of blood vessels.
- harmful substances
- the rest of the body
- metabolic reaction
- direct damage to the lungs
- decreases its bodily water

Fact 1: Constriction occurs when the muscular walls of blood vessels contract. Fact 2: Cocaine constricts the blood vessels. Given the two facts above, cocaine causes what to contract?
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A: Walls of blood vessels.

Problem:OPTIONS:
- wild rides
- nerves
- toadies
- Bodily water
- backbones
- four limbs
- Leptospirosis
- pipe

Fact 1: Vertebrate chordates have a backbone. Fact 2: Because reptiles are vertebrates, they are chordates. Given the two facts above, what do reptiles have?
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A: backbones

Problem:OPTIONS:
- kinetic energy
- electromagnetic energy
- An object is seen
- vibrations in matter
- objects that have mass
- harmful substances
- The bending of a ray of light
- Loud noises

Fact 1: Afirecracker converts chemical energy into sound. Fact 2: Sound waves are vibrations in matter. Given the two facts above, a firecracker converts chemical energy into what?
****
A:
vibrations in matter