Essay...

Posted By:

shadgirl1
Member since:
April, 2010

Status: Offline
Posts: 9171

For this Essay I have for Science, I need 5 pieces of evidence supporting evolution, and I need to explain how each supports the theory.. Any ideas? Please don't comment with anything against Evolution. If you want to say something like that, go to the debates.

They are taking the Hobbits to Isengard!

Essay...

Posted By:

dropitpop393
Member since:
September, 2009

Status: Offline
Posts: 1597

This may be over your head, but if you're old enough, you will understand... he genomes of all organisms contain overwhelming evidence for evolution. All living species share the same basic mechanism of heredity using DNA (or RNA in some viruses) to encode genes that are passed from parent to offspring, and which are transcribed and translated into proteins during each organism’s life. Using DNA sequences, biologists quantify the genetic similarities and differences among species, in order to determine which species are more closely related to one another and which are more distantly related. In doing so, biologists use essentially the same evidence and logic used to determine paternity in lawsuits. The pattern of genetic relatedness between all species indicates a branching tree that implies divergence from a common ancestor. Within this tree of life, there are also occasional reticulations where two branches fuse, rather than separate. (For example, mitochondria are organelles found in the cells of plants and animals. Mitochondria have their own genes, which are more similar to genes in bacteria than to genes on the chromosomes in the cell nucleus. Thus, one of our distant ancestors arose from a symbiosis of two different cell types.) The genetic similarity between species, which exists by virtue of evolution from the same ancestral form, is an essential fact that underlies biomedical research. This similarity allows us to begin to understand the effects of our own genes by conducting research on genes from other species. For example, genes that control the process of DNA repair in bacteria, flies, and mice have been discovered to influence certain cancers in humans. These findings also suggest strategies for intervention that can be explored in other species before testing on humans.

Lets Play A Little Game Called Murder.