Problem:OPTIONS:
- sensory neurons
- Energy.
- Bodily water
- kinetic energy
- alveoli
- the skin
- an organism's body
- spinal column

Fact 1: Mollusks are invertebrates such as the common snail. Fact 2: Invertebrates are animals who lack a backbone or spinal column. Given the two facts above, what does an animal like a mollusk lack that many other animals have?
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A: spinal column

Problem:OPTIONS:
- the body's largest organ
- Veins and arteries.
- epidermis and dermis
- layers of fat
- cell walls
- cell membranes
- endoplasmic reticulum
- brain cells

Fact 1: Ribosomes are sites where proteins are made. Fact 2: Endoplasmic reticulum are membranes attached to ribosomes. Given the two facts above, what are membranes attached to sites where proteins are made?
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A: endoplasmic reticulum

Problem:OPTIONS:
- exercise
- evaporation
- aneurisms
- recovery
- state
- Exfoliation
- movement
- allow growth

Fact 1: Dilation occurs when cell walls relax. Fact 2: Aneurisms are dilations of the blood vessels. Given the two facts above, what occurs when cells walls relax?
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A: aneurisms

Problem:OPTIONS:
- decrease in motion
- flow of electrons
- chronic impact
- Greenhouse gases
- thermometer
- lowering the heat
- It gets heated up
- kinetic energy

Fact 1: Friction causes the temperature of an object to increase. Fact 2: Friction is chronic impact, impact is acute friction. Given the two facts above, what causes the temperature of an object to increase?
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A:
chronic impact