Blog

R10 (Scientific reasoning)Select all that apply. Which statements are examples of overgeneralization?

Scenario F: Insecticide resistance over timeA property management company used the same insecticide monthly for four years. Each year they measured percent surviving a standard dose and the frequency of a resistance allele (R). Year 1: survival 5%; R = 0.06 Year 2: survival 18%; R = 0.20 Year 3: survival 42%; R = 0.45 Year 4: survival 70%; R = 0.72F4. Which action would most likely slow resistance development?

Scenario C: Beverage and workplace performanceA company compared two sugar-free beverages in a customer support center. Drink X contained caffeine; Drink Y was decaf (matched flavor). Volunteers chose which day they took which drink (not randomized). Reaction time was measured using the same 5-minute computer test at 3:00 PM. Data (n=30 each): Drink X: reaction time 290 ms; jitters 40%; sleep 6.1 h Drink Y: reaction time 305 ms; jitters 8%; sleep 7.0 hC5. In most human cells, most ATP from food is produced mainly in the:

Scenario D: Cell division and gene regulationA lab studied a protein (Regulator R) involved in cell division. They compared normal skin cells to melanoma cells. Then they reduced Regulator R in melanoma cells and measured division after 24 hours. Data: Normal: R 1.0; dividing 12% Melanoma: R 3.5; dividing 40% Melanoma + R reduced: R 1.2; dividing 18%D6. Best validity check to include in the write-up:

13. Antibiotics are designed to treat:

Scenario B: Indoor farm lighting scheduleAn indoor farm tested a new lighting schedule for lettuce for 4 weeks. Standard: steady light for 16 h/day. Pulsed: 10 min on / 5 min dim for 16 h/day. During week 3, CO2 levels were higher in the pulsed room due to ventilation issues. Data (n=20 each): Standard: final mass 320 g; water 14.0 L; CO2 week 3 = 420 ppm Pulsed: final mass 350 g; water 13.0 L; CO2 week 3 = 520 ppmB2. The CO2 difference is most likely a:

Evaluate the following claim and answer the question based on your understanding of biological concepts we’ve covered so far. PCR is an advancement in biotechnology that proves guilt in all murder cases. What is the most accurate critique?

6. Enzymes are best described as:

Scenario D: Cell division and gene regulationA lab studied a protein (Regulator R) involved in cell division. They compared normal skin cells to melanoma cells. Then they reduced Regulator R in melanoma cells and measured division after 24 hours. Data: Normal: R 1.0; dividing 12% Melanoma: R 3.5; dividing 40% Melanoma + R reduced: R 1.2; dividing 18%D4. Why can normal skin cells and melanoma cells have different levels of Regulator R?

Scenario A: Start-time pilot and student outcomesA district piloted a later start time at one high school for one grading period. Central shifted from 7:20 AM to 8:05 AM. North stayed at 7:20 AM. Central also launched a new after-school tutoring program during the same period; North did not. Data (averages): Central before: sleep 6.4 h; tardies 18 per 100; exam 78% Central after: sleep 7.1 h; tardies 11 per 100; exam 80% North before: sleep 6.5 h; tardies 17 per 100; exam 79% North after: sleep 6.6 h; tardies 16 per 100; exam 79%A6. Best graph choice to compare tardies across schools and time (before vs after):