Which of the following statements is true about scientific theories?
a. scientific theories are never proven.
b. scientific theories are proposed answers to questions.
c. scientific theories summarize patterns found in nature.
d. scientific theories become hypotheses.

Name the organs of humanelemintary canal.

The third stage of cellular respiration is (2 points)

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.