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Q. Is pollution always caused by humans?
In the most cases pollution is caused by human activity. Other species and some abiotic factors though can also pollute an ecosystem. For instance, the red tide is created by proliferation of some algae and volcanic dust is a consequence of the internal activity of the planet.
Phosphorus deficiency Deficiency of phosphorus is usually primary and is widespread under natural conditions. It is characterized by pica, poor growth, infertility, and osteody
Define Function of thiamin as Regulator of enzyme activity? Thiamin regulates the enzymes involved in carbohydrate metabolism. These are: a) Pyruvate dehydrogenase, which pr
How intracellular cytoplasmic calcium concentration is maintained? Intracellular cytoplasmic calcium concentration is maintained by the following mechanisms: a) Limited entr
An ecosystem includes
An mRNA molecule codifies only one type of protein? Eukaryotic cells have monocistronic mRNA, i.e., every mRNA codifies only one polypeptide chain. Prokaryotes can present poly
What in Genetics is hybridization? The Hybridization in Genetics is the crossing of individuals from "pure" and different lineages in relation to a given trait that is the cros
Lungs - Respiratory Organs In arachnid arthropods such as scorpion and spider, respiration takes place by means of book lungs. There are four pairs of these structures in the
Processes in Succession - Ecology Whether succession is primary or secondary, in terrestrial or aquatic ecosystems, the basic processes involved in succession are similar. The
Magnesium Magnesium is closely related to calcium and phosphorus in its dispersion and functions in the body. Most of the body’s magnesium is found in bones and muscles. Grass
The condition in which there is a DECREASE in the number of white blood cells in humans is termed as: a) Leukocytosis (pron: lew-kO-sigh-toe-sis) b) Leukopenia (pron: lew-kO
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