Remember the law of conservation of mass. The human body uses cellular respiration to make energy.
Using the chemical equation for cellular respiration,
explain how the amounts of oxygen and carbon dioxide
inhaled by the lungs is different from the amounts
exhaled. Explain your answer in 1-2 sentences.

Which of the following lines of evidence would best support your assertion that a particular plant is an angiosperm? a) it produces seeds. b) it retains its fertilized egg within its archaegonium. c) it lacks gametangia. d) it undergoes alternation of generations.

Which sentence best describes the relationship between chlorophyll and the chloroplast? a.) chlorophyll is a chemical found in a chloroplast. b.) chloroplast is a chemical found in a chlorophyll. c.) both chlorophyll and chloroplasts are found in animals. d.) both chlorophyll and chloroplasts make carbon dioxide.

In which state was more than 100 billion tons of coal mined in 2005?