[Q]: What is the missing first step of the following process: - The animal finds or builds a suitable place to hibernate where they can stay warm and protected - The animal moves into their den - Their heart rate and breathing slow down to conserve energy - They emerge from the den when the weather is warming up again.
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[A]: An animal eats a lot of food to fatten up

[Q]: What is the missing first step of the following process: - Water is transported to the leaves in the xylem - Energy harvested through light reaction is stored by forming ATP - Carbon dioxide and energy from ATP are used to create sugar - Oxygen exits the leaves through the stomata by diffusion - The plant reuses the water or the water exits through the stomata as water vapor.
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[A]: Carbon dioxide enters the leaves through the stomates by diffusion

[Q]: What is the missing first step of the following process: - Rain picks up carbon dioxide as it falls to earth - The rain falls on the soil over the limestone - The carbon dioxide in the rain washes through the soil - The carbon dioxide turns into acid - The acid in the rain gets to the limestone below the soil - The acid dissolves the limestone - Acid continues to erode the limestone with more rain over time - The eroded limestone sometimes forms caves.
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[A]: Limestone is located under the soil

[Q]: What is the missing first step of the following process: - Food begins to be processed by the digestive system - The pancreas releases enzymes to aid digestion - Digested food affects the amount of sugar in the blood - The pancreas releases one hormone to lower the blood sugar (glucose) level - The pancreas releases another hormone to raisethe blood sugar (glucose) level.
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[A]:
Food enters the body