AP BIOLOGY

Detailed explanation-1: -During photosynthesis, plants take in carbon dioxide (CO2) and water (H2O) from the air and soil.

Detailed explanation-2: -As plants photosynthesize, they absorb carbon dioxide from the atmosphere.

Detailed explanation-3: -Carbon dioxide is added to the atmosphere naturally when organisms respire or decompose (decay), carbonate rocks are weathered, forest fires occur, and volcanoes erupt. Carbon dioxide is also added to the atmosphere through human activities, such as the burning of fossil fuels and forests and the production of cement.

Detailed explanation-4: -During the natural carbon cycle, carbon is released into the atmosphere from various sources and absorbed through “sinks.” For example humans and plants give off carbon dioxide throughrespiration, making them a source of carbon dioxide, while plants absorb carbon dioxide during photosynthesis, making them a sink.

Detailed explanation-5: -What is photosynthesis? Photosynthesis is the chemical process by which plants, algae, and some bacteria use the energy from sunlight to transform carbon dioxide (a greenhouse gas) from the atmosphere, and water, into organic compounds such as sugars.