Define the problem/observation: my electric fireplace does not light up when i turn it on.

Apart of an ecosystem that can restrict the growth of a population is referred to as

The finches on the galapagos island were similar in form except for variations of their beaks. darwin observed that these variations were useful for: attracting a mate defending territory building nests gathering food

Which are evidence of seafloor spreading? check all that apply. molten material magnetic stripes continent material drilled core samples ocean water samples