active sperm
101Fish — /fish/, n. Hamilton, 1808 93, U.S. statesman: secretary of state 1869 77. * * * I Any of more than 24,000 species of cold blooded vertebrates found worldwide in fresh and salt water. Living species range from the primitive lampreys and hagfishes… …
102Social behaviour in animals — Introduction actions of animals living in communities. Such behaviour may include the feeding of the young, the building of shelters, or the guarding of territory. General characteristics Social behaviour (Social behaviour in animals) …
103Cell — The basic structural and functional unit in people and all living things. Each cell is a small container of chemicals and water wrapped in a membrane. Each cell in the human body there are 100 trillion cells in each of us contains the entire… …
104Progesterone — Systematic (IUPAC) name Pregn 4 ene 3,20 dione …
105Anabolic steroid — cite journal author=Grishkovskaya I, Avvakumov GV, Sklenar G, Dales D, Hammond GL, Muller YA title=Crystal structure of human sex hormone binding globulin: steroid transport by a laminin G like domain journal=EMBO J. volume=19 issue=4… …
106heredity — /heuh red i tee/, n., pl. heredities. Biol. 1. the transmission of genetic characters from parents to offspring: it is dependent upon the segregation and recombination of genes during meiosis and fertilization and results in the genesis of a new… …
107genetic disease, human — Introduction any of the diseases and disorders that are caused by mutations in one or more genes (gene). With the increasing ability to control infectious and nutritional diseases in developed countries, there has come the realization …
108Cell nucleus — HeLa cells stained for the cell nucleus DNA with the Blue Hoechst dye. The central and rightmost cell are in interphase, thus their entire nuclei are labeled. On the left, a cell is going through mitosis and its DNA has condensed ready for… …
109Flowering plant — Flowering plants Temporal range: Early Cretaceous Recent …
110Whale watching — off the coast of Bar Harbor, Maine Whale watching is the practice of observing whales and other cetaceans in their natural habitat. Whales are watched most commonly for recreation (cf. bird watching) but the activity can also serve scientific or… …
