Mass

Outbreeding involves mating within the same family, while inbreeding involves mating with unrelated individuals

Outbreeding is only practiced in plants, while inbreeding is only practiced in animals

Outbreeding and inbreeding are essentially the same and have no distinct differences

Outbreeding involves mating of unrelated individuals, while inbreeding involves mating of closely related individuals (correct)

Mass and weight are essentially the same and can be used interchangeably

Mass is the amount of matter in an object, while weight is the force exerted on an object due to gravity (correct)

Mass is the force exerted on an object due to gravity, while weight is the amount of matter in an object

Mass is only relevant in space, while weight is relevant on Earth