Fats are high energy molecules that assist in a growing organism. There is a lot of calories in fat that can be used for growth.When metabolising fat it produces carbon dioxide, water, and ATP. Sugars and/or starch is useful in the same method, they provide calories necessary for a seed or baby animal to grow. The starch can be cleaved into more managable sugars, and the sugars used in glycolysis and then the products of glycolysis used in the citric acid cycle. Used together an organism would have water from the fat that can be used to hydrolyze the sugars that it would consume to produce ATP.
Light is a form of EM radiation.
EM radiation has no mass (it's just energy packets called photons).
EM radiation can travel through a vacuum. (The speed of light in a vacuum is called c and is around 300,000 m/s).
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Answer:
Endocrine glands make chemicals called hormones and pass them straight into the bloodstream. Hormones can be thought of as chemical messages. From the blood stream, the hormones communicate with the body by heading towards their target cell to bring about a particular change or effect to that cell
C is the only bad sounding thing out of this bunch.