[Q]: What is the missing first step of the following process: - Food is squeezed down the esophagus when you swallow - Acid and enzyme in the stomach break the food down - Releases nutrients - Food then pumped into small intestine - Fluid and enzymes from liver and pancreas pumped into small intestine - Help break food into smallest molecules - Nutrients pass through wall of small intestine - Nutrients absorbed into blood stream - Unused materials passed into large intestine to become fecal matter.
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[A]: An enzyme in saliva begins to break down carbohydrates

[Q]: What is the missing first step of the following process: - The female lays eggs - The eggs are incubated by the parents, by sitting on them, for weeks - The bird hatches from an egg - The parents feed them as the continue to grow - Develop flight feathers - The parents teach them to fly - After learning to fly they leave the nest to live on their own - The next year they breed beginning the cycle again -
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[A]: A male and female bird mate

[Q]: What is the missing first step of the following process: - There is a lot of pressure on the Sun - The pressure forces atoms of hydrogen to fuse together in nuclear reactions - The energy from the reactions gives off different kinds of light - The light travels to the Earth.
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[A]: The gravity of the sun pulls its mass inward

[Q]: What is the missing first step of the following process: - The remains of the plant are buried very fast in sediment - The soft parts of the plant decay - The hard parts of the plant are replaced with minerals - The sediment turns into rock - The rock erodes - The fossil appears on the surface of the ground.
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[A]:
A plant dies