<u>The outer core of the Earth is a liquid layer and it is mainly made up of the metals iron and nickel. </u>
<u>It's also made up of small amounts of other substances. </u>
<u>The outer core is responsible for Earth's magnetic field. </u>
<u>The outer core is the second layer of the Earth.</u>
Answer: A) Proteins and nucleic acids
Explanation:
A fossil would from through mineral replacement by replacing the existing material of the animals bones with minerals, to become petrified. The Minerals will keep the fossil preserved longer.
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Answer:
B
Explanation:
A child needs a beating heart to live, if not they cam't develop.
When someone's pancreas stops producing the hormone that lowers blood sugar because the person hasn't eaten recently
When someone's pancreas hormone increases every time they eat, but decreases when they aren't eating
When a person takes calcium supplements so a gland will stop secreting a hormone that pulls calcium from the bones
