Answer:
When fossil fuels are burned, they release large amounts of carbon dioxide, a greenhouse gas, into the air. Greenhouse gases trap heat in our atmosphere, causing global warming. Already the average global temperature has increased by 1C.
Explanation:
Your answer is B.
The all or nothing principle means that an entire neuron depolarizes to its maximum strength.
Answer:
Many cells: humans
Single cell: Bacteria known as protozoa
Explanation:
