OSAT Biological Sciences (110) case studies
OSAT Biological Sciences (110) · Put your knowledge to work in context.
Biological Sciences (110) is one of the subject-area tests in the Certification Examinations for Oklahoma Educators (CEOE) program, the assessment system Oklahoma uses for educator certification. Candidates typically take it to demonstrate biology content knowledge for a teaching credential in the state; the test is listed among the CEOE tests on the official program website, and registration opened for it on 8/29/23. The exam is organized around four equally weighted content domains - Foundations of Biological Science, Molecular and Cellular Biology, Genetics and Evolution, and Organismal Biology and Ecology - each accounting for 25 percent of the score. That balance matters for study planning: many candidates over-prepare cell and molecular material and under-prepare ecology and organismal content. The OSAT Biological Sciences (110) case studies are 5 cases and about 2,782 words.
1Catalase Inquiry in a One-Spectrophotometer Classroom
At a rural high school, a first-year biology teacher has six lab groups of five students, one 45-minute period, four thermometers, and a single spectrophotometer that reads one cuvette at a time. Students want to test a juice-bottle claim: “Heat destroys natural enzymes.” The teacher plans to use potato catalase and hydrogen peroxide.
711 words, about 4 min2Lactic Acidosis in a Mitochondrial-Disease Infant
A 7-month-old boy is brought to a pediatric clinic with poor feeding, low muscle tone, and developmental delay. He was born at term after an uncomplicated pregnancy, and newborn screening was normal.
479 words, about 2 min3Captive Pupfish and a Controversial Outcross
A conservation team manages a captive population of 40 desert pupfish descended from six wild founders. The population is the only captive stock of this species.
548 words, about 3 min4Grass Carp or Septic Repair in a Eutrophic Lake
A 120-hectare recreational lake has had dense summer algal blooms for five years. Secchi depth has fallen from 2.5 m to 0.6 m.
521 words, about 3 min5Blossom-End Rot and Interveinal Chlorosis in Greenhouse Tomatoes
A greenhouse grower produces tomatoes in 20-L containers filled with a peat-based mix. The irrigation water has pH 7.9 and high bicarbonate.
523 words, about 3 min