Q: Fact 1: Skin is used for protecting the body from harmful substances. Fact 2: Skin is the body's largest organ. Given the two facts above, what can protect the body from harmful substances? | OPTIONS:
- the body's largest organ
- layers of fat
- Electric devices
- bones
- sunburns
- hard outer covering
- deoxyribonucleic acid
- muscle
A: the body's largest organ

Q: Fact 1: Bacteria cause food to spoil. Fact 2: Bacteria thrive in higher temperatures. Given the two facts above, what can cause food to spoil? | OPTIONS:
- single-celled organisms
- Salting
- Higher temperatures
- Canning
- sea squirts
- a pathogens
- Refrigeration
- harmful substances
A: Higher temperatures

Q: Fact 1: An animal needs to attract a mate to reproduce. Fact 2: Animals mate because of smells. Given the two facts above, what do animals use to reproduce? | OPTIONS:
- tapeworms
- glycogen
- cellulose
- smells
- hormones
- RNA
- Echinoids
- pollen
A: smells

Q: Fact 1: All plants have a characteristic life cycle that includes alternation of generations. Fact 2: Goldenrod is a plant that generates activity. Given the two facts above, what does goldenrod life cycle include? | OPTIONS:
- it keeps an organism warm
- sub-units of species
- produce offspring
- seed dispersal
- The flowers are pollinated
- alternation of generations
- that material's properties
- biological diversity
A: alternation of generations