29) The doubling time in the bacterial growth cycle is measured during: a) Prodromal period b) Log phase c) Incubation period d) Convalescence period e) none of the above 34.Singlet oxygen that can kill bacteria is produced by: a) Catalase b) Superoxide Dismutase c) Sunlight radiation d) Gamma radiation e) c & d 35) Bacteria that can grow in your refrigerator but really loves your freezer is labelled as: a) Hypothermophile b) Psychrophile c) Psycrotroph d) Thermophobe e) Archaebacteria

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Soil Ecosystem

Soil provides a habitat or living environment for a large number of different species of organisms as well as plants. It provides all the essential nutrients and minerals for plants to grow. All these together form the soil ecosystem.