Assignment Term 3 task: Evolution INSTRUCTIONS AND INFORMATION Read the following instructions carefully before answering the questions

Assignment Term 3 task: Evolution

INSTRUCTIONS AND INFORMATION

Read the following instructions carefully before answering the questions.

1. This is a formal SBA task and needs to be done under supervised conditions in the classroom.

2. Each learner completes this task on his/her own (under test conditions).

3. Present your answers per the instructions of each question.

4. Draw all diagrams in pencil and labels in blue ink.

5. The diagrams in this task may NOT be drawn to scale.

BACKGROUND INFORMATION

The Theory of Evolution is regarded as a scientific theory since various hypotheses relating to evolution have been tested and verified over time.

QUESTION 1

The fat content of cow's milk may vary between 2,6% and 5%. A farmer has found that there is a high demand for low-fat milk (milk with a fat content of 3% or less). He determined the fat content in the milk produced by the cows on his farm. The results of his survey are given in the table below.

1.1 Draw a histogram to represent the results of the survey.

1.2 Calculate the percentage of the farmer's cows that produce low-fat milk. Show ALL your working. (3)

1.3 State the type of variation that occurs in the cows, based on the evidence in the table. (1)

1.4 Give an explanation for your answer to QUESTION 1.3.