Problem: What is the missing first step of the following process: - The fertilized egg, now a zygote, travels to the uterus - The zygote implants in the uterus - The zygote becomes an embryo - The embryo becomes a fetus - The fetus grows for approximately 9 months - The woman gives birth to a baby - The baby grows into a child - The child becomes an adult - The adult mates with another adult -

A: A sperm and egg meet inside a woman's fallopian tube

Problem: What is the missing first step of the following process: - Recycling trucks pick up the items that are able to be reused - The recyclable items travel to a recycling plant - The items are sorted by what they are made of - The items are broken down into small parts - The small parts are melted to make new raw parts - The raw parts are sold to manufactures to make new items.

A: Items that can be reused are placed into recycling containers

Problem: What is the missing first step of the following process: - You fill the tray with warm water - You carefully place the tray on an even surface in a freezer that is at least 32 degree Farhenheit, the freezing point of water - The water begins to get colder until it starts to freeze solid - The water expands as it freezes, one of the few liquids that has greater volume as a solid - Because you used warm water, the gasses in the water had evaporated out, so you will have nice clear ice cubes without cracks from the trapped gasses -

A: You find an empty ice cube tray

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