Backcross, the mating of a hybrid organism, offspring of genetically unlike parents,with one of its parents or with an organism genetically similar to the parent.
Answer:
Intraspecific interactions, where they are the same species, or interspecific interactions, where they are from different species.
Homologous structures (Not to be confused with Homologous pairs)
Answer: They are both openings within the Earth but, Fumaroles release gases (carbon dioxide, sulfur dioxide, hydrogen chloride, and hydrogen sulfide) and steam, and Geysers release water and steam.
Explanation: