Darwin's Glossary To Explain Natural Selection

The analogy of selective breeding was used by Darwin to explain natural selection. Darwin’s most famous theory is the natural selection. Natural selection is the evolutionary change that comes through the production of variation in different generation and differential survival of individuals with different combinations of theses variable characters. The first reasoning is drawn from three facts which Darwin observed in the natural world around him. He saw that organisms produce more offspring than is required to replace themselves, so the population size increase rapidly. The second fact is that the population numbers tend to stay at the same level in which Darwin himself had seen and confirmed his observations with others. Darwin also realized

An example of general resemblance to the background is peppered moth adult blends in with the tree bark. Disruptive pattern uses strongly contrasting markings such as spots or stripes to break up the outlines of an animal or military vehicle like the spots of a leopard or the stripes of a tiger. Reptiles like the horned lizard of North America get rid of shadows by pressing their bodies to the ground, and their sides are fringed with white scales which break up and camouflage any dark shadow line that might fall along the body’s edge. Some industrious animals actively seek to make themselves cryptic by using materials from their environment, such as twigs, sand, or pieces of shell to conceal their outlines. Case in point for example, a young giraffe lies flat on the ground to prevent the predator from noticing it. Some animals also change their colour of the skin to resemble their current background. A popular animal which uses this behaviour is the chameleon. Animals like zebras use dazzle patterning to escape from predators. When they run from predators like tigers, the motion may dazzle and deteriote predators’ ability to estimate the prey’s speed and direction accurately, giving the prey an improved chance of escape. Another great instance of an animal using camouflage is the great white shark. It is no coincidence that sharks have a colour pattern that makes them blend in. When the shark is observed from above, its dark blue or grey topside will blend in with the background of the deep and dark blue sea and when the shark is seen from below, its white belly will blend in with the bright coloured surface waters along with the sun. The theory is that sharks blending in with the dark blue of the deep sea are