1. Which of the following is used by all living things as the carrier of genetic information? a. Cell b. DNA c. Organ d. Molecule e. Population ANSWER: b 2. The smallest unit of life that can exist as a separate entity is a(n) ___________. a. cell b. molecule c. organ d. population e. ecosystem ANSWER: a 3. The most inclusive level of organization is exemplified by which of the following? a. Heart b. Carbon atom c. DNA d. Zebra e. Red blood cell ANSWER: d 4. What is the correct ordering in the hierarchal levels of the organization of life, from the least inclusive to the most inclusive? a. Atoms, tissues, cells, organs, and organisms b. Molecules, cells, organs, tissues, and organisms c. Ecosystems, populations, tissues, cells, and organs d. Cells, tissues, organs, communities, and populations e. Cells, tissues, organs, organisms, and ecosystems ANSWER: e
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