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Group selection

en.wikipedia.org/wiki/Group_selection

Group selection is a proposed mechanism of evolution in which natural selection acts at the level of the group, instead of at the more conventional level of the individual. Early authors such as V. ...

Concluded that two kinds of cells reproductive and nonreproductive ...

www.answers.com/Q/Concluded_that_two_kinds_of_cells_reproductive_and_nonreproductive_exist

august weismann ... Concluded that two kinds of cells reproductive and nonreproductive exist? ... Who concluded that all cells came from existing cells?

What is the simplest kind of cell that exists today - Answers.com

www.answers.com/Q/What_is_the_simplest_kind_of_cell_that_exists_today

A prokaryotic cell (i.e. a bacteria cell), which has no nucleus or any other ... Concluded that two kinds of cells reproductive and nonreproductive exist?

A Minor Major Transition? - Evolution and Ecology

www-eve.ucdavis.edu/grosberg/Grosberg pdf papers/2007 Grosberg & Strathmann.AREES.pdf

Aug 10, 2007 ... through aggregation of scattered cells or when multicellular organ- ... cells containing chloroplasts and mitochondria; (e) sexual reproduction ..... of two types of cells: (a) internal, unflagellated germ cells that can divide ... A mechanism must exist by ..... 298–99) concluded, “So long as mutations are selfish,.

Cultural Anthropology/Marriage, Reproduction and Kinship ...

en.wikibooks.org/wiki/Cultural_Anthropology/Marriage,_Reproduction_and_Kinship

The two types of kinship which exist are consanguinial (related by blood) or affinal ..... The division of a bacterial cell into two daughter cells is an example of asexual reproduction. ..... The baby is delivered at the conclusion of this stage.

Updating the Mitochondrial Free Radical Theory of Aging: An ... - NCBI

www.ncbi.nlm.nih.gov/pmc/articles/PMC3791058/

Aging is also especially patent in post-mitotic cells such as the immense majority of ..... B), but this conclusion did not take into account that what correlates with .... At least the first of these two kinds of modifications seems to be involved in aging, ...... It has not been reported whether reproductive queens or non-reproductive...

The Biological Notion of Individual (Stanford Encyclopedia of ...

plato.stanford.edu/entries/biology-individual/

Aug 9, 2007 ... Of the many kinds of biological individual, organisms are the most ... Elaborating on two of the examples of biological individuals given ..... cell biology, it is manifest in the diversification of cell types in accord .... also because there are organisms designed to be non-reproductive. ..... Concluding Thoughts.

What's Wrong With Letting Same-Sex - Family Research Council

www.frc.org/whats-wrong-with-letting-same-sex-couples-marry

There are two key reasons why the legal rights, benefits, and responsibilities of civil ... to marriage merely recognize and regulate an institution that already exists . ... of even engaging in the type of sexual act that results in natural reproduction. ... is undoubtedly "no"--which reinforces the conclusion that reproductio...

Regenerative medicine: stem cells and the science of monstrosity ...

mh.bmj.com/content/30/1/12.full

In two texts, The Normal and the Pathological and “Monstrosity and the .... Monstrosities, he concluded, offer us a material insight into the transformative possibilities of the .... What Isidore Geoffroy Saint-Hilaire is describing here is a type of ovarian .... would involve a patient donating a somatic or non-reproductive cell which...

CGS : Placing a Moratorium on Research Cloning to Ensure ...

www.geneticsandsociety.org/article.php?id=188

The conclusion that reproductive cloning should not be permitted has been ..... a moratorium on the creation of cloned embryos for non-reproductive uses, but it simply ... a particular type of cell, then using a cloned embryo as a source of such cells for .... With twins, we have two people who (in principle) begin on a footing of ...

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Name and define the two basic kinds of reproduction - Answers.com

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Name and define the two basic kinds of reproduction? Name and define the two ... Concluded that two kinds of cells reproductive and nonreproductive exist?

Sexual Reproduction

www.nhm.ku.edu

In two of the three families (Eccrinaceae and Parataeniellaceae), there are two ... The thalli then rupture and release a number of motile, amoeboid cells. .... They concluded that the walls possibly contain hemicellulose, but no chitin or cellulose . ..... Except in the Eccrinaceae and Parataeniellaceae, where spore types exist ...

Diversity and evolution of a trait mediating ant–plant interactions ...

aob.oxfordjournals.org

Oct 26, 2012 ... Key Results Two distinct kinds of EFNs exist in two unrelated clades within Senna. ... Reproductive and non-reproductive plant parts represent ..... (H) Median longitudinal section of an iEFN with four kinds of cell layers. ..... Marazzi and Sanderson (2010) concluded that all Senna species bearing gland-like ...