heteromorphism


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het·er·o·mor·phic

 (hĕt′ə-rō-môr′fĭk)
adj.
1. Having different forms at different periods of the life cycle, as in stages of insect metamorphosis.
2. Differing from the standard form in size or structure: heteromorphic chromosome pairs.

het′er·o·mor′phism n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

heteromorphism

1. the quality of differing in form from the standard or norm.
2. the condition of existing in different forms at different stages of development, as certain insects. — heteromorphic, adj.
See also: Insects
1. the quality of differing in form from the standard or norm.
2. the condition of existing in different forms at different stages of development, as certain insects. — heteromorphic, adj.
See also: Form
-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.
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Many higher plants produce diaspores with two or more morpho-physiological traits to favor seed establishment and plant dispersion, a strategy known as seed heteromorphism. This reproductive strategy is found in many plant families and it is particularly common in Asteraceae (Imbert, 2002; Baskin et al., 2014).
Heteromorphism was not noticeable, and the nuclear fission image was not apparent.
Histological heteromorphism in the resected specimens revealed that seven patients had low-grade adenoma, seven had high-grade adenoma, and two had adenocarcinoma.
In vivo, morphological observation illustrated that heteromorphism were not obvious in the cells of HIF-1a/siRNA group and vascular systems were sparse in its transplantation tumor tissue, and immunohistochemistry revealed that both VEGF and CD34 stains were significantly decreased in HIF-1a/siRNA group, and MVD in HIF-1a/siRNA group (7.3+-1.1) were obviously less than that in SCR/siRNA group (17.2+-3.2) (P8 times of erythrocyte diameter were not counted.12 Briefly, the whole section was detected in low power lens (10x10) and the three horizons of the most intensive area (microvascular angiogenic hotspots) were detected.
Seed heteromorphism in Crepis sancta (Asteraceae): performance of two morphs in different environments.--Oikos, 79: 325-332.
In Ectadia diuturna, the pattern of heterochromatin distribution has revealed size heteromorphism of C- bands and differential intensity of rDNA hybridization-signals between homologous chromosomes of long-sized pair.
Variation of seed heteromorphism in: Chenopodium album and the effect of salinity stress on the descendants.
Heteromorphism occurs also in the X chromosomes of the female complement, which may differ both in centromeric position and size (Peshev 1983).
The obvious heteromorphism observed in both types of sperm bundles in T.
Although we are inclined to believe that having a larger seed in comparison to low altitude species may be advantageous for alpine species of higher altitudes, we also accept that this 'trend' is not universal--even within an individual plant the seeds produced vary in size significantly, presumably due to numerous intrinsic and extrinsic factors, e.g., maternal environment, heteromorphism etc.
The second edition contains additional information on breaking of physical dormancy, effects of inbreeding depression and seed heteromorphism as well as new topics like the role of seed banks and the relationship between seed germination and climate change.