churn noun (CUSTOMERS) âº [ S or U ] specialized also churn rate business the number of customers who decide to stop using a service offered by one company and to use another company, usually because it offers a better service or price: Internet and cable television companies suffer from a high churn rate.
Asker's rating. Report Abuse. No, the families they belong to are Rhinos-Rhinocerotidae Hippos-Hippopotamidae Pigs-Suidae Horses-Equidae Family is a particular term used in biological classification. What you may be thinking of is that they are all ungulates (Ungulata-which is a Superorder) - hooved animals.
Hippos likely evolved from a group of anthracotheres about 15 million years ago, the first whales evolved over 50 million years ago, and the ancestor of both these groups was terrestrial. These first whales, such as Pakicetus, were typical land animals. They had long skulls and large carnivorous teeth.