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Video Biología
"A cell is the basic unit of life and all organisms are made up of cells. With regard to an overall cell overview, there are several types of cells. One important distinction is between prokaryotes an ...
"Cell walls are only found in plant cells and are used primarily to create structure, but cell membranes are found in all cells. The bulk of the membrane is composed of a double layer of lipids called ...
"Because DNA is unique to an individual, we can use DNA fingerprinting to match genetic information with the person it came from. First, we use the polymerase chain reaction (PCR) technique to copy a ...
Video Biología
"Cell division is a process which splits a parent cell into two or more daughter cells. Cell division is important in DNA replication. In eukaryotes, the cell division involved is called mitosis where ...
Video Biología
"Cell diffusion is a type of passive cell transport. In diffusion, molecules move from areas of high concentration to areas of low concentration in order to decrease the concentration gradient. Diffus ...
"The carbon cycle is a cycle where carbon is exchanged throughout the Earth’s atmosphere, the terrestrial biosphere, the oceans and sediments.  Carbon in living organisms turns to soil when they ...
Video Biología
"The Calvin cycle is the second step of photosynthesis which converts ATP into glucose for storage. It is also called the "light independent reaction" or the "dark reaction" because unlike the light d ...
"Osmosis is the diffusion of water molecules across a semi-permeable membrane from an area of high concentration to an area of low concentration. In cells, osmosis occurs across the cellular membrane ...
Video Biología
"Organic compounds are compounds composed of carbon, hydrogen and often oxygen or nitrogen. Organic compounds are named so because they are associated with living organisms. Several important types o ...
Hipervinculo Ciencias de la Tierra y Medioambiente
"The biosphere is the zone of air, land and water where organisms exist. It is commonly known as the global sum of all ecosystems and consists of several layers including the atmosphere, the lithosphe ...
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