minerals

Vitamin

...mpass other essential nutrients such as dietary minerals , essential fatty acids or essential amino acid... Pharmacology Vitamin poisoning Dietary minerals References The History of Vitamin Discovery . Retrieved 1 Feb 2005. Bellis, Mary. Histor...

Phloem

...ving) companion cell. While movement of water and minerals through the xylem is driven by negative pressures (tension) most of the time, movement through the phloem is driven by positive hydrostatic pressures . This process is termed translocation , and is accomplished by a process called phloem loading ...

Origin of life

...n source of energy, sulfides of iron and other minerals (e. g. pyrite). The energy released from redox reactions of these metal sulfides is not only available for the synthesis of organic molecules, but also for the formation of oligomers and polymers. It is therefore hypothesized that such systems may be...

Microscope

...in structure of metals (see metallography ) and minerals , another type of microscope is used, where the light is reflected from the examined surface. The light is fed through the same objective using a semi-transparent mirror. Stereo microscope The stereo , binocular or dissecting microscope i...

Lichen

...s the alga against drying out and provides it with minerals obtained from the substratum. If a cyanobacterium is present this can fix nitrogen , complementing the activities of the green alga. Contents showTocToggle("show","hide") 1 Morphology and structure 2 Reproduction 3 Ecology ...

Homeostasis

...lows: The regulation of the amounts of water and minerals in the body. This is known as osmoregulation. This happens in the kidneys. The removal of metabolic waste. This is known as excretion. This is done by the excretory organs such as the kidneys and lungs. The regulation of body temperature. This is ...

Dialysis

...owever, concentrations of glucose, amino acids and minerals are either similar to those of normal plasma to prevent loss, or higher than those of plasma to act as nutrient supplements. If a strong glucose solution is used, osmosis of water from plasma would occur. Dialysis is conducted in a dedicated faci...

Competitive exclusion principle

... number of resources, primarily solar energy and minerals that are dissolved in the water. According to the competitive exclusion principle, only a small number of plankton species should be able to coexist on these resources. Nevertheless, large numbers of plankton species coexist within small regions of o...

Artificial life

... some function (extracting fresh water, harvesting minerals from seawater) for an investment that would be relatively small compared to the huge returns from the exponentially growing numbers of factories. Freeman Dyson also studied the idea, envisioning self-replicating machines sent to explore and exploi...