1 A single mutation can have a large effect, but in many cases, evolutionary change is based on the accumulation of many mutations. 2  Gene flow is any movement of genes from one population to another and is an important source of genetic variation. 3  Sex can introduce new gene combinations into a population.ithout genetic variation, some of the basic mechanisms of evolutionary change cannot operate. There are three primary sources of genetic variation, which we will learn more about: 1  Mutations are changes in the DNA.
Filed under: Dining. If youâre looking for an inexpensive way to beat the heat and stay cool this summer, check out Happy Hour at Sonic Drive In. Drinks and slushes are half price every day from 2:00 p.m. to 4:00 p.m. This offer includes soft drinks, iced teas, slushes (excluding CreamSlush treats) and Limeades only. Flavors and fruit may cost extra. Sonic states they have 398,929 fountain drink and slush combinations to choose from.
In June 2011, the first location under the name Sonic Beach was opened in Homestead, Florida. A second location, opened in Ft. Lauderdale, Florida, in November 2011, lacks the usual drive-in stalls due to its beach-side location.Both locations also include outdoor seating and flatscreen televisions.he new name worked with their existing slogan, Service with the Speed of Sound. After the name change, the first Sonic sign was installed at the Stillwater Top-Hat Drive-In; this was the first of three Sonics that would eventually exist in Stillwater.