Question: Fact 1: Some viruses have an envelope of phospholipids and proteins. Fact 2: Some viruses are also enclosed by an envelope of fat and protein molecules. Given the two facts above, what are some viruses enclosed by? ?
OPTIONS:
- sub-units of species
- phospholipids, fat, molecule
- Germy surfaces
- it keeps an organism warm
- Something that comes in a bundle of fibers
- Something made from fermented ricce
- microorganisms
- A compound that donates proton
Answer: phospholipids, fat, molecule

Question: Fact 1: Many corals secrete an exoskeleton that builds up to become a coral reef. Fact 2: Coral Reefs Coral reefs are the jungles of the sea. Given the two facts above, many corals secrete an exoskeleton that builds up to become what?
OPTIONS:
- important habitats
- jungles of the sea
- seaweed
- gastropod shells
- food and shelter
- dolphins
- major threat to health
- oceans
Answer: jungles of the sea

Question: Fact 1: If a tree falls then sunlight becomes available to the surrounding plants. Fact 2: Plants use sunlight for photosynthesis. Given the two facts above, what can make photosynthesis more accessible to surrounding plants?
OPTIONS:
- Energy.
- a giant earthquake
- circulatory systems
- organic molecules
- a tree falling
- a huge fire
- a great flood
- Solar energy
Answer:
a tree falling