- Study the onion root-tip slides below and Identify the stage of mitosis (most stages are
represented more than once).
i ii iii
iv v vi
- What is the difference between a benign and a malignant tumour?
- Name five preventative measures or behaviours that will decrease your chances of
developing cancer.
- Cancer in South Africa. Look at the following table showing the percentage of deaths
by cancer type in South Africa in 2000.
Cause of death Percentage in all
people
Percentage in
men
Percentage in
women
Tracheal/
Bronchal/ Lung
cancer
16.5 21.9 10.9
Oesophageal
cancer
13.4 16.7 9.9
Cervical cancer 8.4 17.2
Breast cancer 7.7 0.2 15.6
Liver cancer 6.4 7.8 4.9
Colorectal Cancer 6.2 5.4 6.9
Prostate cancer 6.1 11.8
Stomach cancer 5.6 6.5 4.7
Pancreatic cancer 3.7 3.7 3.7
Leukaemia 3.5 3.8 3.2
a) What medical procedures should women take to detect breast cancer early?
b) Draw a bar graph to show the percentage deaths for each type of cancer for men
and women.
c) Which type of cancer is the most common in:
i. men
ii. women
Chapter 4. Cell division 113
