Which of the following are natural barriers to infection?
Ⅰ tears
Ⅱ skin
Ⅲ stomach acid
Ⅳ mucus
3. Question | Mathematics
The expansion of (x - 2)2 is
4. Question | Chemistry
In metals, the particles forming the structure are all:
5. Question | Mathematics
In the circle above, the circumference is
10 cm. The length of the arc AB, in
centimetres, is
6. Question | Chemistry
The major plant nutrients written as NPK refer to phosphorus, nitrogen and:
7. Question | Mathematics
The area of the trapezium ABCD above is
8. Question | English A
Choose the ONE underlined part A, B or C that is inappropriate. If the sentence is acceptable as it stands, choose D.
She was not feeling well at the beginning of the journey, and sitting at the front of the car made her feel worse.
9. Question | Chemistry
The number of atoms in this formula, H2SO4, is:
10. Question | Information Technology
All of the following are systems programs EXCEPT __________
11. Question | Chemistry
g/dm3 are units of:
12. Question | Mathematics
The number 2549 written to 2 significant
figures is
13. Question | Social Studies
Which conclusion can be drawn from the table?
14. Question | Biology
A lack of vitamin D in the diet causes:
15. Question | Mathematics
Which of the following is a prime number?
16. Question | Information Technology
A financial institution needs only to provide the caller with a limited amount of information. A __________ system is ideal to satisfy this need.
17. Question | Biology
Simple sugars are called monosaccharides because:
18. Question | Social Studies
THE ITEM is based on the following extract.
Unemployment and hard economic conditions have forced both parents in some Caribbean families to migrate, leaving an elder son or daughter to care for the younger brothers and sisters.
Which of the following problem is LEAST likely to affect the younger brothers and sisters?
19. Question | Biology
The white blood cells that produce antibodies are called:
20. Question | Biology
Which one of the following is NOT a function of the placenta?