Search results
Results From The WOW.Com Content Network
All the flies look alike whatever inversions they carry: this is an example of a cryptic polymorphism. Accordingly, Dobzhansky favoured the idea that the morphs became fixed in the population by means of Sewall Wright's drift. [54] However, evidence rapidly accumulated to show that natural selection was responsible: Drosophila polytene ...
Polymorphism is common in nature; it is related to biodiversity, genetic variation, and adaptation. Polymorphism usually functions to retain a variety of forms in a population living in a varied environment. [3]: 126 The most common example is sexual dimorphism, which occurs in many organisms.
The discrete nature of polyphenic traits differentiates them from traits like weight and height, which are also dependent on environmental conditions but vary continuously across a spectrum. When a polyphenism is present, an environmental cue causes the organism to develop along a separate pathway, resulting in distinct morphologies; thus, the ...
They come in all shapes and sizes. Some walk, some slither, some fly and some swim. Humans are blessed to share the planet with just over 2.1 million recognized species of animals. And scientists ...
Siphonophorae (from Greek siphōn 'tube' + pherein 'to bear' [2]) is an order within Hydrozoa, which is a class of marine organisms within the phylum Cnidaria.According to the World Register of Marine Species, the order contains 175 species described thus far.
A giant frog species that hopped alongside dinosaurs and is considered a "living fossil" is now losing ground in its native Chile as climate change and human intervention damage its habitat. The ...
In Batesian mimicry, the mimic effectively copies the coloration of an aposematic animal, known as the model, to deceive predators into behaving as if it were distasteful. [ a ] The success of this dishonest display depends on the level of toxicity of the model and the abundance of the model in the geographical area.
Wild chimpanzees inhabit various environments in Africa, from dense tropical rainforests to more open woodland and savannah areas. Researchers examined genetic data from 388 wild chimpanzees in 18 ...