More than five million different kinds of organisms (生物体) live on the Earth. For thousands of years, humans have searched for ways to organize this persity (多样性). In the eighteenth century, a Swedish professor, physician, and naturalist named Carolus Linnaeus developed the system of nami...
Persson K, Persson K, Hansson H, Bjerre B, Svanberg L, Johnsson T, Forsgren A. Prevalence of nine different micro-organisms in the female genital tract. A comparison between women from a venereal disease clinic and from a health control department. Br J Vener Dis. 1979 Dec; 55 (6):...
How many genetically different types of sperm could an animal that is heterozygous dominant for one trait produce? If there are 3 different alleles for a particular gene in a population of diploid organisms, how many different genotypes are possible in the popu...
The phenomenon has been described widely from single-celled organisms to humans. In some cases, the underlying process is simple, and in other cases, the experiments suggest that the subject establishes a specific representation of the stimulus in its nervous system. Establishing a neural ...
Pathogenic lower genital tract organisms in HIV-infected and uninfected women, and their association with postpartum infectious morbidity. OBJECTIVES: To determine the prevalence of vaginal pathogens during pregnancy and their impact on postpartum infectious morbidity among antiretroviral-na茂... SEBITLOANE...
In life science children learn about different environments, the types of organisms adapted to live in each environment, the effects of [...] sfusd.edu 孩子在生命科學中學習有關不同 環境、適合生活於各 環境中的生物類型、環境改變對生物的影響、物種滅亡、以及化石 記錄中的各種生物。 sf...
Blood, urine, and saliva can all be used for STD testing; many infectious organisms will show up in these body fluids, in varying concentrations. This testing is minimally invasive and may be quite rapid, as often the doctor just needs to look under a microscope for signs of bacteria. In...
there are organisms that naturally flourish and exist within the confines of the vaginal walls. These organisms are actually helpful in keeping down the level of harmful bacteria that may invade the organ; but some women, for unknown reasons, do not have appropriate levels of good organisms in ...
The TCA pathway is very common, existing in all aerobic living organisms and even in some anaerobic bacteria. For instance, acetic acid bacteria can oxidize ethanol to acetate. A study has reported the presence of the pathway TCA cycle VII (acetate-producers) in diverse bacterial groups, ...
Two Faces of Stress: Chronic Cold and Restraint Produce Opposite Effects on VTA Dopamine Neuron Activity Anthony Grace*, Ornella Valenti University of Pittsburgh, Pittsburgh, PA Introduction: Stress can have multiple effects on organisms, ranging from increasing responses to environmental stimuli in ...