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Polar in Biological Dictionary

Secondary oocyte

... II until fertilization ... with formation of a polar body and a secondary oocyte . ... What ... one haploid secondary oocyte and the first polar body. ... The secondary oocyte is the largest ... oocyte is produced along with the first polar body as a result of ... Genetically, the ...

Polar nuclei

... Aspects of the topic polar -nucleus are discussed in the following places at ... ... ... sperm combines with the two polar nuclei of the large central cell of ... The remaining two nuclei , called polar nuclei , share the cytoplasm of the large ....

Polar body

... A polar body is a cell structure found inside an ovum. ... plant ova possess it. It is also known as a polar cell. polar body n. A minute cell produced and ...

Terminator region

... night side of a planetary body . On Earth, the terminator is a circular line with a diameter that is approximately that of the Earth. Apart from polar regions, ... The Terminator on IMDb: Movies, TV, Celebs, and ... The Terminator (Special Edition) Product Details. Region : 1 (USA, ...

Subsidiary cells

... cells are modified by a tangential division, giving two ... Subsidiary cells (4–6) typically elongate, or wedge-like, periclinal walls ... polar and lateral subsidiary cells , overlaps that of ... arching subsidiary cells , and the ends of the guard ... Subsidiary cells each with a ...

Reducing agent

... The pair of an oxidizing and reducing agent that are involved in a particular ... LiAlH4 is a strong, unselective reducing agent for polar double bonds, most ... Acidic Reducing Agents . If you look at the reducing agents above, you will note ... The Relative Strengths of ...

Pollen grain

... one ... Each microspore develops by mitosis into a pollen grain . ... that the pollen grain grow a tube ... grain with the egg and polar nuclei is to get pollen ger ... A hard coat covering the pollen grain protects the sperm cells during the ... The pollen grain ...

Polarity

... affirmative and negative ... In chemistry, polarity refers to a separation of electric charge leading to a molecule having an electric dipole. polar molecules can bond together due to dipole–dipole intermolecular forces between one molecule ... chemical polarity ( ′kemikəl pə′larədē ) ( ...

Ootid

... ovum after penetration by sperm but before the formation of a zygote ... number of the ootid and spermatid? How does ootid differ from a polar ... ootid ( ) n. A haploid cell that results from the meiotic division of an oocyte and ... number of the ootid and spermatid? How does ...

Molecule

... consists of multiple atoms joined by shared ... polyatomic molecule ... A tutorial on molecule polarity suitable for use by high school ... polar molecule has ... Shapes of Molecules . Electronegativity and Bond Polarity ... A molecule is the smallest particle in a chemical element or ...

Macromolecules

... with large molecular mass such ... MACROMOLECULES . This text is divided into five major sections: ... Biological macromolecules are polar ... Biosynthesis of these macromolecules will be covered ... Covering significant advances in all fundamental aspects of polymer chemistry, the ...

Lipids

... components ... On function for Lipids is that of Energy storage. Lipids contain a lot of ... Since Lipids are generally insoluble in polar substances such as water, they are ... - Lipids . Phospholipids are Like Triglycerides with a Phosphate Group ... between the hydrophobic lipid ...

Gonads

... study of gonads in triploid ... Information about Gonads in the free online English dictionary and encyclopedia. ... Are pollutants shrinking polar bear gonads ? by Science News. More results ... The Gonads . The gonads produce hormones as well as reproductive cells. Ovarian hormones: ...

Germplasm

... of genetic resources for an organism. For plants, the germplasm may be stored as a seed collection or, for trees, in a nursery. Germ plasm or polar plasm is a zone found in the cytoplasm ... [edit] Germplasm , other usage. Germplasm , the collection of genetic resources [edit] References ....

Endocytosis

... the cell by engulfing it with their cell membrane. It is used by all cells of the body because most substances important to them are large polar molecules that cannot pass through the ... endocytosis n. A process of cellular ingestion by which the plasma membrane folds inward ...

Archaebacteria

... ... But heat does not kill some archaebacteria . ... Archaea or Archaebacteria is a major division of living organisms, as well as ... polar lipids of archaebacteria in sediments and petroleums. Science 217(4554) ... These archaebacteria live in environments without oxygen. ... ...
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(Date:11/24/2009)...ld secrets of the earth,s history locked in its ic...little information on the environments that have b...ars. Now, a team of researchers from nine institut...of $10 million dollars by the National Science Fou...iterally. These scientists will drill through the ...
(Date:11/24/2009)...ew research on bacterial communities throughout si...e temporal patterns, suggesting that scientists co...g climate change in the polar regions. The study, ...ional Academy of Sciences Early Edition, shows th... synchronously over time, correlating with seasona...
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