On-Line Biology Book: GLOSSARY C calcitonin A hormone produced by the thyroid that plays a role in regulating calcium levels. calcium carbonate Chemical that also occurs in limestone and marble. Calvin cycle (aka Calvin-Benson Cycle or Carbon Fixa

On-Line Biology Book: GLOSSARY B bacteriophages Viruses that attack and kill bacterial cells; composed only of DNA and protein. PICTURE bark The outer layer of the stems of woody plants; composed of an outer layer of dead cells ( cork ) and an inne

On-Line Biology Book: GLOSSARY A abiogenesis Early theory that held that some organisms originated from nonliving material. abnormal hemoglobin Hemoglobin molecule with a different shape due to an altered amino acid sequence (ultimately caused by a

INTRODUCTION: THE NATURE OF SCIENCE AND BIOLOGY Medicine Pharmaceutical Biochemical Medical-scienceLearning Objectives | Name the special molecule that sets living things apart from the nonliving world and be able to explain why this molecule is imp

INTRODUCTION: THE NATURE OF SCIENCE AND BIOLOGY Medicine Pharmaceutical Biochemical Medical-science Levels of Organization | Back to Top Biosphere : The sum of all living things taken in conjunction with their environment. In essence, where life occu

INTRODUCTION: THE NATURE OF SCIENCE AND BIOLOGY Medicine Pharmaceutical Biochemical Medical-scienceCharacteristics of living things | Back to Top Living things have a variety of common characteristics. Organization . Living things exhibit a high le

The Diversity of Life | Back to Top Evolutionary theory and the cell theory provide us with a basis for the interrelation of all living things. We also utilize Linneus' hierarchical classification system, adopting (generally) five kingdoms of living

INTRODUCTION: THE NATURE OF SCIENCE AND BIOLOGY Medicine Pharmaceutical Biochemical Medical-scienceDarwinian evolution | Back to Top Charles Darwin, former divinity student and former medical student, secured (through the intercession of his geology