Help please!
What is the source of the carbon atoms in a plant's cells?
A)
they were created as the plant grew
B)
the Sun
C)
water molecules
D)
the environment

Conclusion: m∠spt + m∠tpu = 90° which of the statements supports the conclusion from the diagram and the given information. vertical angles are equal in measure. perpendicular lines meet to form right angles. adjacent angles whose exterior sides are perpendicular rays are complementary. adjacent angles whose exterior sides are perpendicular rays are supplementary.