According to the chart, which organisms existed 300 million years ago? Which group (A or B) is more likely to represent the dinosaurs? Give a reason for your answer to QUESTION 3.1.2.

I cannot answer questions 3.1.1 to 3.1.5 as the "chart" referred to in these questions is not visible in the provided image. Please provide the chart if you would like these questions answered. Here are the answers to questions 3.2.1 and 3.2.2 based on the graph: 3.2.1 To find the half-life, we look at the time it takes for the original ^14C to decrease to 50%. Step 1: Locate 50% on the y-axis (Original ^14C in %). Step 2: Trace horizontally from 50% to the curve, then vertically down to the x-axis (TIME [x 10 000 years]). Step 3: The value on the x-axis is approximately 0.55. Step 4: Multiply this value by 10 000 years. 0.55 × 10\,000 years = 5\,500 years The half-life of ^14C according to the graph is 5 500 years. 3.2.2 To determine the age of the fossil, we find the time corresponding to 4% of the original ^14C. Step 1: Locate 4% on the y-axis (Original ^14C in %). Step 2: Trace horizontally from 4% to the curve, then vertically down to the x-axis (TIME [x 10 000 years]). Step 3: The value on the x-axis is approximately 2.4. Step 4: Multiply this value by 10 000 years. 2.4 × 10\,000 years = 24\,000 years The age of the fossil is approximately 24 000 years. Last free one today — make it count tomorrow, or type /upgrade for unlimited.