Problem: What is the missing first step of the following process: - The virus has receptors that lock onto a target cell - The virus enters the cell - The virus uses the cell like a factory to make new copies of the virus - The new copies of the virus leave the cell - Infect other cells - The host gets sick as its cells are damaged.

A: A virus enters a host body

Problem: Given the question: What is the missing first step of the following process: - Bacteria enters through the wound - The bacteria reproduces and spreads - Causes symptoms - The bacteria is either fought off or becomes a disease.
++++++++++++++++++++++++++++++++
The answer is:
Skin is cut or damaged

input question: What is the missing first step of the following process: - After a rain, water seeps into cracks and pores of soil and rock - The water percolates beneath the land surface - Some of the water reaches a zone where all the cracks and pores in the rock are already filled with water - Rainwater absorbs some carbon dioxide as it passes through the atmosphere and even more as it drains through soil and decaying vegetation - The water combines chemically with the carbon dioxide - A weak carbonic acid solution is formed - This acid slowly dissolves calcite, forms solution cavities, and excavates passageways -???
output answer: Solution caves are formed in limestone and similar rocks by the action of water

What is the missing first step of the following process: - Magma crystalizes - Lava cools on the surface - Lava crystalizes - Minerals dissolved in water crystlize.
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Answer: Magma cools inside the crust

Q: What is the missing first step of the following process: - Mix gets inducted into cylinder - Piston compresses the mix - Spark plug emits a spark that ignites it causing combustion - Combustion gases expand - Pushes piston during power stroke - Exhaust valve opens to vent exhaust out tail pipe.
A: Fuel mixes with air

[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