Homologous structure are body parts that are similar to each other. They are almost the same, but not quite. That's how the meanings are similar.
Answer:
Radiation.
Explanation:
Radiation is the only method of heat transfer that doesn't require matter to transfer heat.
Answer: origin.
The end of a muscle that is attached to the immovable bone is called the origin.
In some parts I have found that they refer origin of a muscle as the bone, while in other parts I have found that they refer tha origin is part of the muscle.
Anyway, the question is refering to this part: the origin of a muscle, which is a the end of a muscle that is attached an immovable or less movable bone.
The more species there are, the more likely some of them can survive disasters such as tornadoes, floods, or in this case volcanic eruptions. They can then produce more offspring to repopulate the area.