Biology

Evolution

- Evolution: is defined as the process of cumulative modify in the heritable characteristics of a population.
- Over time, if enough changes croak in a population, a new species can arise.

fossil Record

- Palaeontologists have been collecting and classifying fossils in an organized fashion for around two centuries.
- One conclusion that can be worn-out from observing fossils is that life on Earth is constantly changing. close of the changes have been over huge timescales (hundreds of thousands or millions of years) that humans discover difficult to appreciate.

Artificial Selection

- By watching which males mated with which females, breeders could keep in line which characteristics the offspring would have. Over the years, breeders learned to choose the males and females with the most preferred genetic characteristics and breed them together.
- After practising selective breeding for hemorrhoid and sometimes hundreds of generations, farmers and breeders realized that certain varieties of animals had unique combinations of characteristics which did not represent before.
-The farmers and breeders choose which animals will re recrudesce and which will not. This is called artificial survival of the fittest and it should be obvious that it is certainly not the driving speciality of evolution in natural ecosystems.





Homologous anatomical structures

- different evidence for evolution comes in the form of homologous anatomical structures which are similar in form and function just now which are found in seemingly dissimilar species. Ex: Five-fingered limbs.
- Pentadactyl limbs: penta means five and dactyl refers to fingers.
- Darwin explained that homologous structures were not just a coincidence but they are evidence that the organisms in scruple havge a common ancestor.

Too many offspring

- Plants often produce hundreds or thousands more than seeds than necessary to propagate the species.
- Mushrooms produce millions more spores than ever grow into new mushrooms.
- A female slant lays...If you want to get a full essay, order it on our website: Ordercustompaper.com



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