Answer:
We hear a lot about the amount of carbon in our atmosphere increasing, but the actual number of carbon atoms on our planet has not changed since the Earth first formed. It's just that more carbon is spending more time as gas.
Explanation:
Answer:
B - Shape of the molecule that is known as a double helix
Explanation:
Answer: blood travels from the heart through arteries and blood travels to the heart through the veins.
I hope this helps