Sexual selection

the biological elements on earth in order to adapt, survive, and reproduce. Scientists have discovered many evidence of the way evolution has changed throughout the years. They have discovered things such as transitional fossils, and the way some selections play a role in science. However, there is still one universal question concerning people in terms of evolutionary modification: is it a scientific theory or fact? One of the elements that scientists have discovered are transitional fossils.…

humans are able to artificially alter their physical appearance to be more attractive, causing sexual selection to alter the gene pool less and less. In addition, people are able to remove the pressures which question the fitness of individuals using medical technology. Finally, as genetic research continues to advance, humans can alter their genes and the genes of their children to bypass natural selection in the process of improving the species. The first factor which allows…

topic of natural selection and evolution. These scientists reviewed the natural space-use patterns and hippocampal size in kangaroo rats after undergoing evolution by natural selection. The size of the hippocampus, which is a forebrain structure that processes spatial information, correlates with the need to relocate food caches by passerine birds and with sex-specific patterns of space use in microtine rodents. However, the influences on hippocampal anatomy of sexual selection within species,…

Natural selection can be seen as a force, and evolution as a result. Natural selection can be broken down into three concepts that require it to operate. The first is the constant struggle a species face for survival, which results in the continuation of the successful branches of the species, as the others become extinct. The second requirement is a varying population, these more successful branches only stem from mutated groups or individuals whose features become beneficial when faced with…

To understand the origin of whales, it's necessary to have a basic understanding of how natural selection works. Natural selection can change a species in small ways, causing a population to change color or size over the course of several generations. This is called "microevolution." But natural selection is also capable of much more. Given enough time and enough accumulated changes, natural selection can create entirely new species, known as "macroevolution." It can turn dinosaurs into birds,…

Biological evolution happens over thousands of generations after generations. In order for a generation to transpire, sexual reproduction is the key. Natural selection is basically the survival and reproduction of the organism that is most likely to thrive. Sexual reproduction takes the DNA from both the male and the female and passes it down to the offspring. In this passing of DNA, mutations are normally expected. These mutations can be…

Selection is the idea that individuals in a given population with certain traits will survive and produce more offspring because they have certain desired traits. In turn, this will create a change in the population. There are three main ingredients that are necessary for selection to occur within a population. These three ingredients are variation, differential success, and heredity. Variation is the differences among individuals in the composition of their genes. Genes are what determine…

The modern synthesis for the evolutionary theory began from the coming together of Wallace’s, Mendel’s and Darwin’s thoughts concerning evolution as well as heredity along with the modern study for popular genetics. This describes the evolution of populations and species from the smaller changes among the individuals to large scale changes occurring over paleontological time periods. To be specific, current understanding on speciation arising from the concept of reproductive isolation and the…

Charles Darwin is the father of evolution by natural selection and was seen as a figurehead for logical and pure reasoning. Even today the image of Darwin is one of the most circulated and recognizable images. In the nineteenth-century Darwin had a cultish following from the public, but that did not mean that everyone accepted his work as fact. Those who did accept his work were quick to expand the ideas presented by Darwin and use them to justify their own cause. One of these was the use of…

considered very radical, and more specifically the concept of natural selection. The basic premise of natural selection is that the organisms that are more suited to thrive in their environment will be the most likely to survive over their competition, and subsequently this improves the species as a whole over years of gradual progression. Behavior can also be shaped by natural selection. However, it is important to note that natural selection is all relative and largely depends on the…