Answer: Four conditions are needed for natural selection to occur: reproduction, heredity, variation in fitness or organisms, variation in individual characters among members of the population. If they are met, natural selection automatically results.
Explanation:
Answer: D. Heat
Explanation : Water Vapor is a source of warmth, since the heat that is radiated from Earth is absorbed by the water vapor. This is why greenhouses use water vapor as well.
Matter makes up everything.
When an advanced airway is in place, it may be reasonable for a rescuer to deliver 1 breath every 6 seconds<span> during continuous chest compressions. It may be reasonable to immediately resume chest compressions after shock delivery without a pause for a rhythm check.</span>
