How can allel frequnices change from one gerneration to the next?

Inbreeding, mutation, random genetic drift, migration, extinction, and natural selection all contribute to how allel frequnices can change from generation to generation.

in a word, a scientific question is testable. a testable question is one that asks about objects, organisms or events found in the world around it

i think its control and coordinate because im pretty sure thats what tissue does and the joints are what control movement and then your skeletal/ bones provides portection. hope that .