On-Line Biology Book: GLOSSARY L labia majora The outer folds of skin that cover and protect the genital region in women. PICTURE labia minora Thin membranous folds of skin outside the vaginal opening. PICTURE lactose intolerance A genetic trait c
On-Line Biology Book: GLOSSARY J K jejunum The second portion of the small intestine . Also, a popular month for weddings! PICTURE Jurassic Period Middle period of the Mesozoic Era , between 185-135 million years ago. Characterized by the (possible
On-Line Biology Book: GLOSSARY H habitat disruption A disturbance of the physical environment in which a population lives. hair bulb The base of a hair; contains cells that divide mitotically to produce columns of hair cells. hair root The portion
On-Line Biology Book: GLOSSARY H habitat disruption A disturbance of the physical environment in which a population lives. hair bulb The base of a hair; contains cells that divide mitotically to produce columns of hair cells. hair root The portion
On-Line Biology Book: GLOSSARY G Gaia A hypothetical superorganism composed of the Earth's four spheres: the biosphere , hydrosphere , lithosphere , and atmosphere . gametes Haploid reproductive cells ( ovum and sperm ). PICTURE gametophyte The ha
On-Line Biology Book: GLOSSARY F families 1. In taxonomy , term applied to subcategories within orders. 2. Term applied to a group of similar things, such as languages, chromosomes, etc. PICTURE fats 1. Triglycerides that are solid at room temperat
On-Line Biology Book: GLOSSARY E eccrine glands Sweat glands that are linked to the sympathetic nervous system and are widely distributed over the body surface. ecological niche The role an organism occupies and the function it performs in an ecosy
On-Line Biology Book: GLOSSARY D dark reactions The photosynthetic process in which food (sugar) molecules are formed from carbon dioxide from the atmosphere with the use of ATP ; can occur in the dark as long as ATP is present. death rate The rati
