20. Macrophages use MHC class I molecules directly in their defense strategy.

8. Gene flow means most nearly the same as:

6. All of the following statements are true about mutations EXCEPT:

5.1.2 a) Calculate the sum of the number of protons, neutrons, and electrons. Type your calculation and final answer. b) Is 3 a factor of the answer you got? Type YES/NO. c) State whether your answer is a prime or composite number. (4)

3.9 Calculate the quotient of 60 and 15. Choose the correct answer below: (1)

4.5 Type >,< or = in: 0,08 [ans1]   (8/100) (1)

3.10 In the number sentence: 525 ÷ 25 = 21 The divisor is: (1)

QUESTION 4 Complete the following calculations by filling in the missing number(s) or symbol(s):

QUESTION 3 The following questions are multiple-choice questions. Carefully read the following questions and choose the correct answer from the list.

3.7 Convert the following common fraction to a decimal number.    (83/1000) (1)