An e-reader, also called an e-book reader or e-book device, is a mobile electronic device that is designed primarily for the purpose of reading e-books and digital periodicals. An e-reader is similar in form, but more limited in purpose than a tablet.-book reading is increasing in the US; by 2014 28% of adults had read an e-book, compared to 23% in 2013.
1 Ecology (pronunciation) â The study of the interaction of organisms with each other and with their environment.  Geobiology (pronunciation) â A science that combines geology and biology to study the interactions of organisms with their environment.
Life comes in many shapes, forms and sizes and a huge amount of the life on Earth is so small that humans can only see them with the use of a microscope. A number disciplines in of biology, such as microbiology, biochemistry and genetics, are focused entirely on studying the microscopic forms of life and the molecules that allow life to exist. The study of the microscopic world falls into two main categories.