Charles Darwin theory of evolution by natural selection states the individual with the better reproductive habit or characteristic will be successful in survival. ‘Survival of the fittest.’ In any given situation some are more likely to survive and some are not, that is because individuals are different. Individuals that have better characteristics like camouflage from the predator will be able to survive and pass on that trait, creating more offsprings like them. If that individual is able to pass on traits the population will grow and can become overpopulated. Over population will cause competition and possible extinction. That means if there are too much of one species in a population, survival will be scarce because of the low amounts of food and environment to live in. “Evolution occurs as advantage traits” meaning the percentage of the individual that has that trait of survival will go up and the ones who do not will die off and decrease. …show more content…
An example would be the cactus and the euphorbs, both plants are found in deserts but just in different parts of the world. Both plants adapted parts that were required to live, photosynthetic stems for water storage, spines that protect the plants, and reduced leaves, Different plants most likely lived there but because of the change in climate to a very dry climate, only the plants that bore adaptation were able to survive the dry environment.
Selection for resistance can possibly occur if a population is able to survive a treatment with insecticide. The population that survives will be able to pass on their resistance traits to the offspring. The individual that does not survive dies and soon the species will become extinct. More and more individuals with that resistant trait will increase the population. Soon the once effective treatment will not longer have an effect on the