The science behind gaining and losing body mass
By: Litsa Podaras
Though simple to understand, the body mass and its fat are a bit more complicated than that. First and foremost, one should know that fat is a good thing. It is necessary for insulation in the hot as well as the cold weather. It is...
Structure and function of the cell membrane
By: Mariyam Ishraag - 688854
Cell membrane, which was discovered during the 2nd half of the 19th century, can be defined simply as a biological membrane that separates the interior of all cells from the outside environment. It acts as both the defense line and communication line of the cell...
By: Heather Brennan
Human bodies are composed of millions upon millions of cells, and each cell is a complex unit composed of organelles, a nucleus, cytoplasm and a cell membrane that holds it all together. The only exception to this rule is red blood cells, which have no...
By: Heather Brennan
The lysosome is the cell’s digestive system. Found in nearly all eukaryotic cells, lysosomes are responsible for digesting macromolecules and other structures that enter the cell by endocytosis. It is a single membrane organelle that contains hydrolytic enzymes. Most cells contain a few hundred...
By: Dr. Bryan Katz
The human body is composed of trillions of cells and their products. The cell represents the most basic level of structure and function. From there, the level of organization increases in complexity to tissues, organs, organ systems and, ultimately, the organism as a total package...
The transport system in plants
By: Christyl Rivers
Plants, just like all other living beings, need a circulatory system. The transport system in any plant is much alike from a three thousand year old giant sequoia to the tiniest weed hidden deeply within the forest or meadow. Nutrients must transport to both leaves...
By: Rose Mueni
Growth hormones in plants are the chemicals that determine and regulate growth in plants. Plant growth hormones are defined as “Any of various hormones produced by plants that control or regulate germination, growth, metabolism, or other physiological activities.” These hormones are also known...
By: Colette Georgii
Minerals are needed by the human body for healthy growth and development. Most minerals come from plants and must be grown in a mineral-rich soil in order to contain the essential minerals need by the human body. Some minerals come indirectly from animal sources. Other...
Plants and photosynthesis
By: Jose Juan Gutierrez
Photosynthesis is the process by which plants absorb the Sun’s energy to drive a series of chemical reactions to produce carbohydrates in the form of glucose and release oxygen in the process. These carbohydrates are then used by the plant and other organisms as...
By: Virginia Gaces
Diffusion is defined by Hyperphysics as the process by which molecules intermingle with each other randomly as a result of their kinetic energy. In layman’s terms, it is the movement of particles in solution from a higher concentration to a lower concentration. There are...

 

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