The fossil record shows a sequence from simple bacteria to more complicated organisms through time, it is very reliable because it is physical evidence and by studying fossils, scientists can learn how much (or how little) organisms have changed as life developed on Earth.
Answer:
Arteries carry blood away from the heart
Explanation:
Veins carry the blood back to the heart.
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It's a mutualism relationship because both species can benefit from each other.
prokaryotic cells do not have a nucleus.
Answer: When the weather is hot or your body temperature rises due to exercise or fever, sweat is released through ducts in your skin. It moistens the surface of your body and cools you down as it evaporates.
Explanation:
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