https://padlet.com/ashnavds/m0oj4fdq1xd9 Survival of the fittest en-us 2017-05-02 18:38:00 UTC 2025-10-01 22:24:21 UTC hello@padlet.com https://padlet.com/ashnavds/m0oj4fdq1xd9/wish/169620301 Variation: In the homozygous recessive individuals have anaemia which causes early death.Heterozygous have acute anaemia and since plasmodium cannot survive in sickle celled shaped RBC they are resistant to malaria.

Struggle for existance: malarial regions like Asia and eat Africa contain 40% of the population carrying ]]> 2017-05-03 08:56:38 UTC https://padlet.com/ashnavds/m0oj4fdq1xd9/wish/169620301 https://padlet.com/ashnavds/m0oj4fdq1xd9/wish/169620349 bacteria have become immune to antibiotics. The use of antibiotic leads to natural selction ,elimination of sensitive strains abd survival if antibiotics resistant population. Examples of bact resistant to antibio are methicillenresistant stafelllococcusorreous.]]> 2017-05-03 08:56:53 UTC https://padlet.com/ashnavds/m0oj4fdq1xd9/wish/169620349 https://padlet.com/ashnavds/m0oj4fdq1xd9/wish/169620368 The prevalence of dark coloured varieties of animals in industrial areas where they are better camaflouged than paler forms. 
Eg: peppered moths during the industrial revolution. Before the industrial revolution, peppered moths in the UK were pale grey, but after their habitats became polluted with soot from coal‐fired industries, melanic (black) phenotypes became numerous and spread to other regions. Away from industrial centres, the pale phenotype remained common. Following clean air legislation a century later, the atmosphere improved, soot‐damaged habitats gradually recovered, and the pale phenotype returned as the predominant form. ]]> 2017-05-03 08:56:59 UTC https://padlet.com/ashnavds/m0oj4fdq1xd9/wish/169620368 https://padlet.com/ashnavds/m0oj4fdq1xd9/wish/169621178 Variation- DDT resistant dominant, DDT sensitive recessive. 

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