The average speed of a greyhound dog increases gradually in succeeding generations after only the fastest of a brood are allowed to interbreed. what is this variation an example of?

genetic drift

stabilizing selection

directional selection

disruptive selection

Hedgerows have created a new ecosystem within britain’s a. farms b. cities c. forests d. industrial areas

In a lab, scientists grew several generations of offspring of a plant using the method shown. what conclusion can you make about the offspring? a. they formed from meiosis and mitosis. b. they have half the number of chromosomes as their parent. c. they have low genetic variability among them. d. they will be able to reproduce only after they grow flowers.

Which was not a reason why canals were built in florida