Periderm is the corky outer layer of a plant stem formed in secondary thickening or as a response to injury or infection. It is a cylindrical tissue that covers the surfaces of stems and roots of perennial plants during early secondary growth; therefore it is not found in monocots and …

Introduction Endless diversity of lives are there in the ocean which enthralls us absolutely to explore further. In that deep blue world, thousands of species are awaiting to be acquainted with us. They are the true components of the oceanic ecosystem who not only embellished “deep blue beauty” but also …

The marine environment is an essential component of the global life-support system. Marine environment is different from the terrestrial and freshwater aquatic environment having high salt concentration. Its water covers approximately 71% of the earth’s surface. This is equivalent to 361 million sq. kilometers (139 million sq. miles). Average depth of …