a. What is the main idea of the video? Write the correct option in the notebook and give reasons for your answer. The video is about how cell phones have changed since they were invented The video is about how heavy car phones were. The video is about how much the first cell phone cost.

Plzzz hurry im being timed ! humans, like other organisms, require energy for growth and repair. when cells create atp for energy, carbon dioxide is produced as a waste product. how does the body respond to this process in order to maintain homeostasis? a. the digestive and respiratory systems interact to move carbon dioxide to the lower intestine, where it is transformed into methane. b. the circulatory and digestive systems interact to move carbon dioxide to the stomach, where it to break down food. c. the nervous and urinary systems interact to move carbon dioxide to the kidneys, where it is absorbed into the bloodstream. d. the circulatory and respiratory systems interact to transport carbon dioxide to the lungs, where it is expelled from the body.

Dna is always read in the whereas rna is read in .

9. the history of life on earth is recorded in