A Respiration by animals CO2 is being added.
B trees burning same
C tree leaves removed
D oil added
The statistics of weather how hot or cold it is
The hormone calcitonin, which is produced by the parafollicular or C cells of the thyroid, has the opposite effect on blood calcium levels as does PTH. I hope this helps! : )
Answer:
Explanation:
What is science? The goal of science is to learn how nature works by observing the natural and physical world, and to understand this world through research and experimentation.
Answer: Yes they are
Explanation: plz mark brainliest
