Answer:
These chemical reactions produce waste products such as carbon dioxide, water, salts, urea and uric acid. Accumulation of these wastes beyond a level inside the body is harmful to the body. The excretory organs remove these wastes. This process of removal of metabolic waste from the body is known as excretion.
desirable: When observing bacteria
not desirable: When eating food.
Her Menstrual Cycle is what puberty is for a girl ... also known as her period
Cigarette smoking and environmental chemicals
Tobacco smoke and certain environmental chemicals are known carcinogens (substances that can cause cancer in living tissue). The tobacco smoke from cigarette smoking contains harmful chemicals such as hydrogen cyanide, arsenic, ammonia, benzene, and many more. In fact, from 2009 to 2013, three out of 10 cancer deaths in the U.S have been attributed to cigarette smoking or exposure to tobacco smoke.
<span>The quality of Australian land is unique as the properties of the earth crust are different. There is no much of evolution of land and is an isolated space which is the reason for the said placental mammals do not habitat there but has their own diverse kind of these marsupials.</span>
