The below mentioned article provides a study note on echolocation of bats. Some kinds of bats are able to fly and feed in the dark because of their famous 'radar' system which allows them to avoid all obstacles. They obtain the major part of their information through the ear and reflection of the sound waves that they emit at the [...]
The below mentioned article provides a study note on integument in mammals. The integument or skin in mammals as well as in all vertebrates is continuous with the mucous membrane of mouth, rectum, urinogenital organs, nostrils and eyelids. The skin is made up of two distinct and embryo-logically different layers. The outer layer is epidermis and it is ectodermal in [...]
The below mentioned article provides a study note on cetaceans. Cetaceans are true aquatic mammals. There are two lineages among extant cetaceans. One lineage is Mysticeti which includes baleen whales, and the other lineage is Odontoceti that contains the toothed whales (dolphins, porpoises and other toothed whales). The baleen whales are mainly zooplankton feeders (Zooplanktonophagous) and filter their food through [...]