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"A food chain is a diagram which depicts the series of organisms which eat each other, starting with a producer (generally a plant) and ending with the apex species. It is useful to think of food chai ...
Video Biología
"The skeletal system serves many purposes in an organism's body, including supporting and protecting body movements and producing red blood cells that the circulatory system carries. Jellyfish and wor ...
"The evolution of populations is defined as the changes populations undergo when organisms change over time as predicted by Darwin's Theory of Evolution. Over time, organisms which are most fit for th ...
Video Biología
"Eukaryotic cells are more complex than prokaryotic cells. Eukaryotic cells are found in most of the more complex kingdoms of life including fungi, animals, plants and protists. Eukaryotic cells have ...
"Enzymes are proteins that catalyze chemical reactions by facilitating the positioning of molecules. In biochemical pathways, sequences of enzymes form a chain of chemical reactions. Enzymes, like all ...
Video Biología
"Sex chromosomes are chromosomes that contain information that is used to determine the gender of an organism. The expression of a sex chromosome on an allele can either be X or Y. Organisms with sex ...
"The endoplasmic reticulum is an organelle in which an array of cell functions takes place, notably including the production of proteins, steroids and lipids. Proteins are formed in ribosomes, found i ...
Video Biología
"The endocrine system signals information to help the body function. Each gland in the endocrine system produces a different type of hormone to regulate all the different types of functions in the bod ...
Video Biología
"The sensory system is the part of the nervous system that recognizes and processes sensory information. This system includes sensory receptors, neural pathways and parts of the brain. The sensory sys ...
"The electron transport system is the stage in cellular respiration in which oxidative phosphorylation occurs and the bulk of the ATP is produced. The electron transport system creates an electron gra ...
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