Grade 12 Biology practice

What is on the worksheet

1. Supplied fictional records give M = 38 initially marked, C = 70 in a later sample, and R = 31 marked in that sample. Use N ≈ MC/R under the stated assumptions. No animals are to be handled. Round to 3 decimal places if needed.

2. Supplied fictional records give M = 45 initially marked, C = 29 in a later sample, and R = 12 marked in that sample. Use N ≈ MC/R under the stated assumptions. No animals are to be handled. Round to 3 decimal places if needed.

3. In the simple Aa × Aa inheritance model with independent outcomes, the probability of aa is 1/4. Among 616 offspring, find the expected aa count, not a guaranteed outcome. Round to 3 decimal places if needed.

4. A fictional circulation model has 66 beats/min and 51 mL/beat. Find its flow in mL/min. These are supplied model values, not diagnostic ranges. Round to 3 decimal places if needed. Answer in mL/min.

5. A fictional population starts at 419. During one interval: 22 births, 7 arrivals, 35 deaths and 13 departures. Find the final count. Round to 3 decimal places if needed.

6. Supplied fictional records give M = 89 initially marked, C = 84 in a later sample, and R = 66 marked in that sample. Use N ≈ MC/R under the stated assumptions. No animals are to be handled. Round to 3 decimal places if needed.

7. A fictional diploid organism has 98 chromosomes in a normal somatic nucleus. In the standard meiosis model, how many chromosomes are in a haploid gamete? Round to 3 decimal places if needed.

8. A fictional population starts at 542. During one interval: 73 births, 40 arrivals, 34 deaths and 28 departures. Find the final count. Round to 3 decimal places if needed.

9. A fictional circulation model has 97 beats/min and 55 mL/beat. Find its flow in mL/min. These are supplied model values, not diagnostic ranges. Round to 3 decimal places if needed. Answer in mL/min.

10. A fictional diploid organism has 106 chromosomes in a normal somatic nucleus. In the standard meiosis model, how many chromosomes are in a haploid gamete? Round to 3 decimal places if needed.

11. Supplied fictional records give M = 54 initially marked, C = 95 in a later sample, and R = 20 marked in that sample. Use N ≈ MC/R under the stated assumptions. No animals are to be handled. Round to 3 decimal places if needed.

12. A fictional circulation model has 77 beats/min and 66 mL/beat. Find its flow in mL/min. These are supplied model values, not diagnostic ranges. Round to 3 decimal places if needed. Answer in mL/min.

13. A fictional population starts at 565. During one interval: 51 births, 19 arrivals, 55 deaths and 18 departures. Find the final count. Round to 3 decimal places if needed.

14. In a canonical double-stranded DNA sample, adenine is 44% of all bases. Find the guanine percentage, assuming A = T and C = G. Round to 3 decimal places if needed. Answer in %.

15. In the simple Aa × Aa inheritance model with independent outcomes, the probability of aa is 1/4. Among 608 offspring, find the expected aa count, not a guaranteed outcome. Round to 3 decimal places if needed.

16. Supplied fictional records give M = 64 initially marked, C = 70 in a later sample, and R = 9 marked in that sample. Use N ≈ MC/R under the stated assumptions. No animals are to be handled. Round to 3 decimal places if needed.

17. A fictional circulation model has 96 beats/min and 88 mL/beat. Find its flow in mL/min. These are supplied model values, not diagnostic ranges. Round to 3 decimal places if needed. Answer in mL/min.

18. Supplied fictional records give M = 60 initially marked, C = 50 in a later sample, and R = 10 marked in that sample. Use N ≈ MC/R under the stated assumptions. No animals are to be handled. Round to 3 decimal places if needed.

19. Supplied fictional records give M = 47 initially marked, C = 89 in a later sample, and R = 8 marked in that sample. Use N ≈ MC/R under the stated assumptions. No animals are to be handled. Round to 3 decimal places if needed.

20. Supplied fictional records give M = 42 initially marked, C = 46 in a later sample, and R = 12 marked in that sample. Use N ≈ MC/R under the stated assumptions. No animals are to be handled. Round to 3 decimal places if needed.