Please answer this: What is the missing first step of the following process: - Composition of blood is regulated - Volume of water in blood is kept constant - PH is kept at a constant level - Kidneys help regulate blood pressure - Kidneys stimulate the making of red blood cells - Calcium levels are maintained.
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Answer: Kidneys filter waste out of blood

Problem: What is the missing first step of the following process: - The water will turn into water vapor - Collect the water vapor - Allow the water vapor to cool - The water vapor will turn into liquid water - The salt will be separated from the water.

A: Boil salt water

Problem: Given the question: What is the missing first step of the following process: - The spore lands on a piece of bread - The spore grows hyphae into the bread - The mold forms a colony - Sporangiophores grow upward - The mold sends out spores.
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The answer is:
A mold spore floats through the air

input question: What is the missing first step of the following process: - Nephrons in the kidney filter the blood - The waste that is filtered out mixes with water - Become urine - Ureters carry urine out of the kidneys.???
output answer: Blood carried into kidney by the renal artery

What is the missing first step of the following process: - Eventually it burns all its hydrogen - Becomes a red giant - Once the red giant burns itself out - The core of the star collapses - The gasses will start to disperse - Only the core is left - A white dwarf has been formed.
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Answer: A star burns in space

Q: What is the missing first step of the following process: - The shaft of the turbine spins - Shaft is connected to a generator - The generator uses the spins of the shaft to rotate a rotor - The rotor spins inside the core, which has magnets inside surrounded by wire loops inside - The spinning of the rotor in the core generates electricity -
A:
Wind passes the turbines and moves the blades