<span>Professor Kwang Jeon observed that some amoebas in his invaded amoeba colonies survived thanks to changes made by the invading bacterias. This comfirmed the endosymbiotic theory that organells are formerly invading free living prokaryotes forms that were integrated and swallowed by others to form a new living unit.</span>
Fitness.
Explanation:
Fitness is a relative thing.A genotypes' fitness include its ability to survive,find a mate,produce off spring.
The thalamus receives messages from muscles, tendons, joints and structures in our ear to control balance, coordination, movement and motor skills.
