What is the missing first step of the following process:  -  These pores are called stomata - Water is absorbed by the roots and passes through vessels in the stem on its way to the leaves - Chlorophyll absorbs the sun&#x27;s energy - It is this energy that is used to split water molecules into hydrogen and oxygen - Oxygen is released from the leaves into the atmosphere - Hydrogen and carbon dioxide are used to form glucose or food for plants.
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Answer: Carbon dioxide from the air passes through small pores (holes) in the leaves


What is the missing first step of the following process:  -  Cells in the pancrease release glucagon - The liver in response turns the glucagon into glucose - And releases it into the blood - The blood sugar levels are restored.
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Answer: The blood sugar drops in a body


What is the missing first step of the following process:  -  Fill the tray with cool water - Place the tray in the freezer - Leave the tray in the freezer for a few hours - Take they tray out of the freezer - Pop the ice cubes out of tray.
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Answer: