Question

a-An experiment was conducted to measure the concentration of urea in three urine samples of
three individuals A, B and C who are at the same age and same weight. The three individuals
consumed different types of food but of the same amount.
Urea is a metabolic waste product formed when excess amino acids are broken down in the
liver.
Table 1.1 presents data concerning the type of food consumed by three individuals A, B and C
and the concentration of urea contained in the urine of each one of them.
i- What is the aim of the
experiment?.........
.[1]
ii-What is the independent variable (the variable that is changed)?
[1]
iii-What is the dependent variable (the variable measured in the experiment?
...[1]
iv-Which individual is the control?.
..[1]
What is the purpose of the control?.
-. [1]
v- Mention 3 control variables in the experiment.(variables that are kept the same)
...[1]
[3]
vi- Is it a fair experiment? Give a reason.
. [2]
vii-Using the table below, which individual consumes more proteins?
viii-What relationship can be established between the type of food consumed and the
concentration of
urea?.
..[1]
ix- Where and how is urea formed?.
[2]
b- Fig. 1.2 shows a food test carried out on a solution X containing egg white.
i- Which type of nutrient is present in solution X?
-- [1] MT​

Answer 1

Answer:

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Explanation:

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