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This tree diagram, used to show the divergence of species, is the only illustration in the Origin of Species. Darwin proposes sexual selection, driven by competition between males for mates, to explain sexually dimorphic features such as lion manes, deer antlers, peacock tails, bird songs, and the bright plumage of some male birds. [129]
This book was a landmark in the evolutionary synthesis, as it presented the union of Mendelian genetics and Darwinian theory. [17] In Genetics and the Origin of Species, polyploidy is considered as a type of mutation. Polyploid cells have a chromosome number that is more than twice the haploid number.
By his own account, Herbert Spencer described a concept similar to "survival of the fittest" in his 1852 "A Theory of Population". [9] He first used the phrase – after reading Charles Darwin's On the Origin of Species – in his Principles of Biology of 1864 [10] in which he drew parallels between his economic theories and Darwin's biological, evolutionary ones, writing, "This survival of ...
Requiem for a Species: Why We Resist the Truth about Climate Change is a 2010 non-fiction book by Australian academic Clive Hamilton which explores climate change denial and its implications. It argues that climate change will bring about large-scale, harmful consequences for habitability for life on Earth including humans, which it is too late ...
Dawkins builds upon George C. Williams's book Adaptation and Natural Selection (1966), which argued that altruism is not based upon group benefit per se, [4] but results from selection that occurs "at the level of the gene mediated by the phenotype" [5] and that any selection at the group level occurred only under rare circumstances. [6]
When a plant or species disappears for good in these modern times, it leaves behind a warning to our own species. Are we wise enough to hear it? Column: Humans have driven 21 more species to ...
Abyssal scavengers and insects survive by feeding on the dead organisms. Some reptiles, amphibians, and small mammals manage to survive the impact from below the ground, while a single lineage of dinosaurs, the birds, also survive via eggs laid in the ground. These survivors are said to follow in the dinosaurs' footsteps to take their places in ...
A poll last year found that 81% of Republicans, 87% of independents, and 97% of Democrats believe the government should do more to help endangered species. Endangered species could help us survive ...