Different of an element have different numbers of neutrons.

What is the relation ship between structure and function in an organism

What are some possible short and long term medical concerns for crew members on longer space exploration trips

Which of these statements is true about autotrophs, but not heterotrophs? a. they use sugar and oxygen to make carbon dioxide and water. b. they use chlorophyll and oxygen to make carbon dioxide and water. c. they use sunlight, water, and carbon dioxide to make sugars. d. they use sunlight, water, and oxygen to make chlorophyll.