Ecological world

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biological oxygen demand indicator of pollution caused by an effluent. related to the uptake ot dissolved oxygen by microorganisms that decompose organic matter present in the effluent biomass weight of living material. typically expressed as dry weight per unit area or volume biome large regional or subcontinental system characterized by a particular major vegetation ',such as a temperate deciduous forest): biomes are distinguished by the predominant 71ants associated with a particular climate (especially temperature and precipitation) biosphere that part of the environment of Earth in which living organisms are found biotic refers to the living components of an ecosystem biotic potential maximum reproductive potential of an organism  bog wetland ecosystem characterized by acidic conditions and accumulation of peat. dominated by sphagnum moss bottom-up regulation regulation of a community or ecosystem trophic structure related to increased ...

Among those leading the fight against the massive Indian-owned Carmichael coal project in Australia's Queensland state is 21-year-old Murrawah Johnson of the Wangan and Jagalingou aboriginal people, the traditional owners of the land where the proposed mine is to be located. Murrawah Johnson, 21, of the Wangan and Jagalingou Family Council, is among those standing in the way of the huge Carmichael coal mine project in Australia's Queensland state. Photo courtesy of Murrawah Johnson. "Our people are the unique people from that country," says Murrawah, whose name means ‘rainbow' in the indigenous Gubbi Gubbi language. "That is who we are in our identity, in our culture, in our song and in our dance," she adds. The Wangan and Jagalingou, numbering up to 500 people, regard the Carmichael coal mine as a threat to their very existence and have repeatedly rejected the advances of Adani Mining, the company behind the project. The traditional owner...

What is a gene? Support Stated Clearly on Patreon:  https://www.patreon.com/statedclearly You've probably heard about GMOs or Genetically Modified Organisms but what exactly is a gene and what does it mean to modify the genes of a plant or animal? We hear about DNA and genes all the time in the news and in our biology classes but very few of us can actually explain what a gene is? This short film is designed to help. Here we discuss a basic definition of a gene, show what a gene looks like, what it is that genes actually code for, and the basic idea behind Genetically Modified Organisms.  The video also briefly mentions one of the ways DNA strongly suggests that all living things are related and share an evolutionary history. Even though the content given here is just a simplified overview of genetics, after watching this video (along with our first video on DNA  http://www.youtube.com/watch?v=zwibgN... ) you should be able to easily follow any ne...

                       DNA , or deoxyribonucleic acid, is the hereditary material in humans and almost all other organisms. Nearly every cell in a person’s body has the same DNA . Most DNA is located in the cell nucleus (where it is called nuclear DNA), but a small amount of DNA can also be found in the mitochondria (where it is called mitochondrial DNA or mtDNA). The information in DNA is stored as a code made up of four chemical bases: adenine (A), guanine (G), cytosine (C), and thymine (T). Human DNA consists of about 3 billion bases, and more than 99 percent of those bases are the same in all people. The order, or sequence, of these bases determines the information available for building and maintaining an organism, similar to the way in which letters of the alphabet appear in a certain order to form words and sentences.                           ...

                                      Cells are the basic building blocks of all living things. The human body is composed of trillions of cells. They provide structure for the body, take in nutrients from food, convert those nutrients into energy, and carry out specialized functions. Cells also contain the body’s hereditary material and can make copies of themselves. Cells have many parts, each with a different function. Some of these parts, called organelles, are specialized structures that perform certain tasks within the cell. Human cells contain the following major parts, listed in alphabetical order: Cytoplasm  (illustration) Within cells, the cytoplasm is made up of a jelly-like fluid (called the cytosol) and other structures that surround the nucleus. Cytoskeleton The cytoskeleton is a network of long fibers that make up the cell’s structural framework. The cytoskele...

                                T he Earth is the only planet in the solar system where there is life. If you look down at the Earth from a plane you will see how wonderful our planet is. You will see blue seas and oceans, rivers and lakes, high snow-capped mountains, green forests and fields. For centuries man lived in harmony with nature until industrialization brought human society into conflict with the natural environment. Today, the contradictions between man and nature have acquired a dramatic character. With the development of civilization man’s interference in nature has increased. Every year the world’s industry pollutes the atmosphere with millions of tons of dust and other harmful substances. The seas and rivers are poisoned with industrial waste, chemical and sewage discharge. People who live in big cities are badly affected by harmful discharge from plants and city transport and by the incre...