ILEARN Biology ECA case studies
ILEARN Biology ECA · Put your knowledge to work in context.
The ILEARN Biology End-of-Course Assessment (ECA) is Indiana’s summative end-of-course test for high school biology. Students are required to participate upon completion of the high school biology course-whether taken in middle or high school-to fulfill a federal participation requirement. The ECA is part of the ILEARN assessment system, which measures achievement and growth related to Indiana Academic Standards. The Biology ECA is a computer-adaptive test (CAT) based on the Indiana Academic Standards for Science. The ILEARN Biology ECA case studies are 5 cases and about 4,042 words.
1The Dialysis Bag: Reading Permeability from Four Observations
A student seals 10 mL of a solution containing 5% glucose and 1% starch inside a length of dialysis tubing whose pores exclude molecules larger than roughly 14,000 daltons, then blots the outside dry. The filled bag weighs 12.4 g.
816 words, about 4 min2A Family Risk Estimate After One Affected Child
Amara and Dev are healthy and have no relatives with any genetic disorder, yet their first child was diagnosed with an autosomal recessive condition. Testing found two different variants in the same gene, one inherited from each parent, and confirmed that both parents carry one variant each.
750 words, about 4 min3Resistance in Two Valleys: Selection on Variation That Was Already There
Alfalfa growers in two neighboring valleys farm the same aphid species. In Valley A, fields have been sprayed every June since 2015 with the same pyrethroid insecticide.
769 words, about 4 min4Two Lakes, Same Phosphorus: Choosing a Management Action
North Lake covers 40 hectares and receives runoff from surrounding farm fields. Total phosphorus measures 85 µg/L; chlorophyll a is 45 µg/L; Secchi depth is 0.8 m.
861 words, about 4 min5Two Glucose Curves: When the Signal Is Loud but the Response Is Weak
Two sedentary adults, both 45 years old, drink 75 g of glucose after an overnight fast. Blood is drawn at 0, 30, and 120 minutes and assayed for glucose (mg/dL) and insulin (µU/mL).
846 words, about 4 min