SECTION A

Question

QUESTION 1 [15 marks]
1.1 Various options are provided as possible answers to the following
questions. Choose the correct answer and write only the letter (A to D)
next to the question number (1.1.1 to 1.1.3), for example, 1.1.3. E
Question 1.1.1 [2 marks]
The hormone aldosterone regulates the concentration of …
A waste substances
B glucose
C sodium ions
D carbonate ions
Question 1.1.2 [2 marks]
Which ONE of the following substances is excreted by the skin, lungs and
kidneys?
A urea
B uric acid
C water
D carbon dioxide
Question 1.1.3 [2 marks]
Which ONE of the following represents density-dependent and
density-independent factors respectively?

Answer 1

1.1.1 C
1.1.2 A
1.1.3 (The options are missing for this question; please provide them, and I'll be happy to help!)