Multiple ChoiceWhich of the following processes can transfer carbon from seashells (composed mainly of calcium carbonate, CaCO$_3$) to the atmosphere?12views
Multiple ChoiceWhich of the following best describes the role of carbon in biological systems?25views
Multiple ChoiceAfter a carbon atom leaves Earth's atmosphere as part of a carbon dioxide molecule, where can it go next in the carbon cycle?7views
Multiple ChoiceAll living things contain carbon. Which of the following statements about carbon atoms is true?23views
Multiple ChoiceWhich of the following best describes the primary role of carbon in biological systems?22views
Multiple ChoiceWhich of the following best describes the primary role of carbon in biological systems?12views
Multiple ChoiceWhich of the following best describes the primary role of carbon in biological systems?25views