(i) Regeneration: It is the process by which certain organisms can regrow or replace lost or damaged parts of their body. Examples include starfish regrowing lost arms. 
(ii) Budding: It is a type of asexual reproduction where a new organism grows from a bud on the parent organism. The bud detaches when fully developed. An example is in hydra. 
Find the unknown frequency if 24 is the median of the following frequency distribution:
\[\begin{array}{|c|c|c|c|c|c|} \hline \text{Class-interval} & 0-10 & 10-20 & 20-30 & 30-40 & 40-50 \\ \hline \text{Frequency} & 5 & 25 & 25 & \text{$p$} & 7 \\ \hline \end{array}\]