cultivation of plants * domestication = genetic alteration of plants by humans * selection: occurs constantly in populations of plants – certain characteristics are being selected for or against * Natural Selection: occurs in wild populations containing natural variation – environment selects for survival value * Artificial Selection: occurs in domesticated populations containing natural variation – humans select for certain traints. * not necessarily beneficial to plant
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We Indians boast about unity in diversity as we have many varieties of religions‚ castes and communities but do we really appreciate and embrace this difference? The answer is a big no. We‚ in our school textbooks‚ read about this and discuss this very briefly but what we fail to do is to analyse the present situation. Today I saw a documentary on honor killings. Honor killings are done under the name of protecting the caste name. The very popular and recent case is the case of Ilavarasan and Divya
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Charles Darwin formulated his idea of natural selection at age thirty‚ he published his work years later for fear of the controversy that would overshadow his work. Darwin’s theory of natural selection challenged the normal science of the time: the belief that a divine creator created all the species‚ which were incapable of change. Darwin’s theory also challenged the overarching authority of the time: the church‚ which supported the ideology of God creating a static species. Furthermore‚ Darwin lacked
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heritable characteristic or traits in living organisms which are passed from one generation to another and gives rise to diversity at every stage of the organism’s biological organisation. The process of evolution was not well understood until 19th century when Charles Darwin proposed the scientific theory of natural selection as a driving tool in evolution. The process involved both the macroevolution in which organisms went through major evolutionary changes over a long period of time and acquired
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Beginning of Life on Earth Question 1 a) What is one of the suggestions for the beginning of life on Earth? What is the problem with this idea? The article states that suggestions have been made that germs of life may have made their way to Earth from outer space. This may have occurred due to comet dust resting on the Earth’s surface. Another theory proposed by Francis Crick states a spaceship sent out by a distant civilisation may have contained the first signs of life. The issue with these ideas
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Darwin ’s Evolution by Natural Selection Darwin ’s Evolution by Natural Selection Charles Darwin is known in the science community as one of the pioneers of the theory of evolution. While many people believe that Darwin founded the theory of evolution‚ he actually didn’t. The theory of evolution actually dates back to the ancient Greeks. Greek philosopher Anaximander actually began the theory of life developing from non-life and the gradual evolution of man from animal. However‚ Darwin
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“Evolution by natural selection is now replaced by evolution through human intervention.” Evolution has been one of the big topics on the science part of the world. Through years‚ there has been many debates on not the idea of evolution but by which process(es) it undergoes. There is the natural and artificial selections. I take I have enough knowledge to distinguish both sides of the argument and to take my stand which would be somewhere right in the middle‚ leaning more on the natural selection side. It
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Doubting Darwin Doubting Darwin covers a few of many beliefs in how we came to be‚ evolution and intelligent design‚ and how it has influenced the world and in the education system. Many people disagree with intelligent design and other disagree with evolution but some people believe that both had a part in how we came to be. Evolution is split into to two central concepts. The first is universal common descent‚ it is the idea that every living creature can be traced back to an unbroken
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Despite of different diversities there are bonds of unity in India. These bonds of unity may be located in a certain underlying uniformity of life as well as in certain mechanisms of integration. Herbert Risley‚ Census Commissioner in 1911 has rightly observed‚ “Beneath the manifold diversity of physical and social type‚ language‚ custom and religion which strike the observer in India there can still be discerned a certain underlying uniformity of life from the Himalayas to Cape Comorin”. India
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plants became the most important employers in the Mwanza region. They took advantage of their important position and pay as low wages and price for the fish as possible. Hundreds of farmers from the surrounding villages gave up their previous work and life and became one of the fishermen or the limited workforce of
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