Unit Test — Unit test Answers

Which type of molecule that can be found in living things lacks carbon atoms?

A scientist is examining the role of an element found in fats and carbohydrates of living things. This element makes up 65% of human body mass. Which statement describes the element he is studying?

A scientist hypothesized that oxygen atoms from both carbon dioxide and water are used to make glucose during photosynthesis. However, experimental results using oxygen isotopes showed that all of the oxygen from the water ended up in the oxygen molecules that were produced. None of the oxygen from water was found in glucose. What should the scientist do to best gain scientific understanding of this topic?

Which sphere of Earth includes icebergs?

Hemophilia is a disease that causes uncontrollable bleeding. If a father has it, all of his daughters will be carriers of the disease. Which macromolecule is involved in how hemophilia is passed from parents to their children?