Problem:OPTIONS:
- peachleaf willow
- colon
- lungs
- fertilization
- spread flower seeds
- photosynthesis
- aerobic capacity
- Plants growth

Fact 1: Reproduction is the process by which organisms give rise to offspring. Fact 2: Reproduction is sexual with internal fertilization. Given the two facts above, what allows organisms to give rise to offspring?
****
A: fertilization

Problem:OPTIONS:
- layers of fat
- RNA splicing
- aqueous solution
- by indirect light
- permineralization
- Dilution
- scarce resources
- adding heat

Fact 1: Introns are regions that do not code for proteins. Fact 2: Introns are removed by RNA splicing. Given the two facts above, how are regions that do not code for proteins removed?
****
A: RNA splicing

Problem:OPTIONS:
- reproduce
- homogenous
- negative
- dangerous
- Loose
- parasites
- complex
- fungi

Fact 1: Populations of viruses do not grow through cell division because they are not cells. Fact 2: Viruses are parasites of cells. Given the two facts above, populations of viruses do not grow through division because they are what?
****
A: parasites

Problem:OPTIONS:
- water
- swamp vegetation
- Calcium carbonate
- sunlight
- contamination
- loose soil
- underground caves
- arsenic

Fact 1: Acavern is formed by carbonic acid in groundwater seeping through rock and dissolving limestone. Fact 2: Underground caves and caverns pose an exciting adventure to many. Given the two facts above, what can be formed by carbonic acid in groundwater seeping through rock and dissolving limestone?
****
A:
underground caves