Problem:OPTIONS:
- combine genes
- rapid expansion
- fertilize gametes
- reproduce
- allow growth
- build proteins
- spread flower seeds
- remove eggs

Fact 1: Fertilization of gametes produces a diploid zygote. Fact 2: Sperm and egg nuclei combine to form the diploid zygotic nucleus 2. Given the two facts above, sperm and egg nuclei combine to do what?
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A: fertilize gametes

Problem:OPTIONS:
- Plant growth is reduced
- an amoebae
- layers of sediment
- single-celled organisms
- loose soil
- layers of fungus
- layers of bone
- layers of mucus

Fact 1: Fossils are formed when layers of sediment cover the remains of organisms over time. Fact 2: Fossils are evidence of prehistoric life that is preserved in rock. Given the two facts above, prehistoric life is preserved in rock when what covers the remains over time?
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A: layers of sediment

Problem:OPTIONS:
- Frogs
- pigeons
- gills
- alveoli
- fish
- ferns
- four limbs
- water

Fact 1: Lungs are used for breathing air by land animals. Fact 2: Inside of the lungs are little sacks called alveoli. Given the two facts above, what are used for breathing air by land animals?
****
A: alveoli

Problem:OPTIONS:
- apples
- bees
- seeds
- plants
- sunlight
- Tropical
- solar flares
- bushes

Fact 1: Some flowers become fruits. Fact 2: An apple tree produces an apple fruit. Given the two facts above, what do some flowers become?
****
A:
apples