Severe depression and bipolar disorder
The population of the organism. Either forcing some away or drawing the ones who can adapt in.
Fossils, or preserved parts of organisms from the distant past, have shown that species change over time. Radiometric dating can be used to determine the age of fossils by measuring the how much of the radioactive materials in each rock layer have broken down.
Genes they assort independently if they follow the 9: 3: 3: 1 rule resulting from a dihybrid cross.
It shows that the genes are not on the same chromosome and they are not included.