Step 1: Understanding Dialysis
Dialysis is a medical procedure used to filter waste products and excess fluids from the blood when the kidneys are not functioning properly. This process is related to the excretion function of the body.
Step 2: Why Other Options are Incorrect
- (A) Nutrition: Dialysis is not related to the absorption of nutrients.
- (B) Respiration: It is not related to the breathing process or gas exchange.
- (D) Transportation: Dialysis does not involve the transport of substances but is focused on waste removal.
Thus, the correct answer is (C) to excretion.
Find the unknown frequency if 24 is the median of the following frequency distribution:
\[\begin{array}{|c|c|c|c|c|c|} \hline \text{Class-interval} & 0-10 & 10-20 & 20-30 & 30-40 & 40-50 \\ \hline \text{Frequency} & 5 & 25 & 25 & \text{$p$} & 7 \\ \hline \end{array}\]
Two concentric circles are of radii $8\ \text{cm}$ and $5\ \text{cm}$. Find the length of the chord of the larger circle which touches (is tangent to) the smaller circle.