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**EINDE VAN DIE VRAESTEL**

Question 1.3   Carefully read through the questions on this dichotomous key.  Use the key to identify the wasp in the picture.   Click on the button below to open the picture of the dichotomous key.     [ans1] (1)

Question 2.4   In 1928 a scientist called Alexander Fleming grew microorganisms called bacteria. Growth shows that bacteria are living things. The bacteria grew on agar (jelly) in glass dishes. After a few days Fleming saw moulding growing in one glass dishes.       Click on the button below to open the picture of the bacteria in the glass dishes.     Bacteria cause disease. Fleming thought he could use the mould to help cure disease caused by bacteria. Look at the pictures and compare Day 1 and Day 6. Use the evidence in the pictures opposite to explain why Fleming thought the mould could be used to cure disease. (1)  

Question 2 Answer the following questions regarding microorganisms:

Question 2.3   Steve’s chicken was fresh but food that has begun to decay can also be very dangerous. Steve’s chicken was kept in the fridge to keep it fresh.   Write down another way we preserve food to stop it decaying. (1)

Question 3 Answer the following questions regarding the circulatory system:

Question 5.3   When are drugs legal? (1)

Question 1.1   Why did Carl Linnaeus create the Linnaean system? (1)

Question 4.4   Nutrients and water are absorbed into the blood and the blood is circulated throughout the body. Explain what happens to the nutrients and water when it passes cells. (2)

Question 1.2   We sort living things into different groups at different levels. What is the name of the last level of groupings? [ans1] (1)