This diagram shows how oxygen is cycled through an ecosystem. which part of this diagram does not contain an element from the periodic table that is essential to life?

a. sugars being formed in the tree's leaves
b. sunlight rays hitting the earth's surface
c. the rhino breathing in oxygen
d. the tree taking in carbon dioxide

Select all the correct answers. for a claim about the natural world to be considered scientific, what attributes must it have? a).it must be applicable to future events and occurrences. b)it must be based on scientific observations that can be repeated in a controlled setting. c)it must be open to modification if new evidence doesn't completely support it. d)it must be consistent with only a small portion of relevant observations or data.