Experiment: Place moths on dark and light branches in an aviary. Release birds i

Question

Experiment: Place moths on dark and light branches in an aviary. Release birds into the aviary. Record the time since the birds entered the aviary at which each moth was eaten. ON DARK BRANCHES dark peppered 10 15 20 25 3035404550 55 6 time (minutes) at which moth was eaten ON LICHEN COVERED BRANCHES dark peppered 10 15 20 25 30 35 40 45 50 55 6 time (minutes) at which moth was eaten On dark branches: 1. What was the average time by which DARK moths On lichen covered branches: 1. What was the average time by which DARK moths were eaten? were eaten? 2. When was the last DARK moth eaten? 2. When was the first DARK moth eaten? 3. The first 25% of DARK moths were eaten within 3. What was the average time by which PEPPERED moths were eaten? minutes. 4. What was the average time by which PEPPERED moths 4. When was the last PEPPERED moth eaten? were eaten? 75% of the PEPPERED moth were eaten within 5. When was the first PEPPERED moth eaten? minutes

Explanation / Answer

Please find the answers below:

Part 1:

Answer 1: The average time by which the dark moths were eaten will be given by 50+25/2 or 37.5 minutes.

Answer 2: As seen from the graph, the last dark moth was eaten at the 50th minute.

Answer 3: The first 25% of dark moths were eaten by: 50-25/4 or 6.25 minutes.

Answer 4: The average time by which peppered moths were eaten can be calculated as 60+20/2 or 40 minutes.

Answer 5: As seen from the grahical representation, the first peppered moth was eaten at 20th minute.

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