Answer:
In science, a variable is any item, factor, or condition that can be controlled or changed
The most likely cause of the beak variation is the food source of the finch, the break size and shape was adapted to most likely have easier and better access to food. <span />
Answer:
The cosmic microwave background radiation.
This is completely consistent with a fireball event in which the radiation field was in thermal equilibrium, and is perhaps the most convincing evidence for the Big Bang.
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The molecules in a solid object are packed together, meaning that they are closely together and can’t move freely
