Inpart oneandpart twoof our guide to mammals, you found out what a mammal is. Now it’s time to discover the many different types of mammal alive today. There areover 5,000 different species of mammal. We’re not going to meetallof them here, but we are going to discover all of ...
Whale, any of the larger species of aquatic mammals belonging to the order Cetacea. Whales are the heaviest known animals, living or fossil, reaching a maximum size in the blue whale of perhaps more than 30 meters and 200 metric tons. They are distribute
movement attracts attention and interest, particularly as it becomes apparent that the behaviour of some creatures is not so very different fromhuman behaviour. Other than out of simple curiosity, humans study animals to learn about themselves, who are a very recent product of theevolutionof ...
The nature and function of cells The cell membrane Internal membranes The nucleus The mitochondrion and the chloroplast The cytoskeleton The cell matrix and cell-to-cell communication Cell division and growth Cell differentiation The evolution of cells ...