As a result, populations of side-blotched lizards cycle in the distribution of these phenotypes—in one generation, orange might predominate, and then yellow males will begin to rise in frequency. Once yellow m
when geographical barriers separate organisms of a population reproductive isolation as a result of geographic isolation, the isolated organisms are forced to reproduce, causing speciation gradualism speciation over a long period of time punctuated equilibrium speciation that occurs in rapid spurts but the...
gradualism The theory that evolution occurs slowly but steadily analogous structure Body parts that share a common function, but not structure Becoming Bipedal (4-6 million years ago) Allowed the species to survive in more diverse habitats such as grasslands use of technology types of tools are st...
Individuals with advantageous traits survive longest and leave the most offspring, a process known as natural selection What did Gregor Mendel's theories of inheritance confirm? Darwin's assumption that certain traits are heritable How do new variations arise? By chance as a result of random mutatio...
a process that occurs as a result of differences in fitness. Organisms ability to reproduce and survive is called... Fitness Darwin called changes from one organism to another from the same species... variation Give an example of variations in the same species and (Many different answers) Pepp...
___results in changes in frequency in the inherited traits of a population over time and occurs when different traits of the individual members of a population result in those organisms dealing either more less effectively with the current environment Is when humans select which traits are preferred...
Occurs when there are differences in fitness in a given population. As a result, some organisms pass more genes to the next generation. This causes the allele frequency to change Why is the CO1 gene an appropriate one to use as the "Barcode of Life?" CO1 helps produce ATP, meaning it...
change in allele frequencies as a result of the migration of a small subgroup of a population gene flow Movement of alleles into or out of a population due to the migration of individuals to or from the population stabilizing selection Natural selection that favors intermediate variants by acting...
evolution occurs by the gradual accumulation of small changes. Punctual Equilibrium Evolutionary history consists of geographically long periods of stasis with little or no evolution Evidence for evolution 1. Prokaryotes (3.5 BYA)2. Eukaryotes (2.1 BYA)3. Multicellularity (700 MYA ...
condition that occurs when the frequency of alleles in a particular gene pool remain constant over time genetic drift A change in the allele frequency of a population as a result of chance events rather than natural selection. homologous structures ...