Alleles
I had bio a while ago though so I could be wrong...
Answer:
X, right trigger, left trigger, left bumper, left, left, Y
Explanation:
There may be many forms of a single gene. Each such form is called an allele
The oral mucosa is the mucous membrane lining the inside of the mouth and consists of stratified squamous epithelium termed oral epithelium and an underlying connective tissue termed lamina propria
A company logging is most likely to trigger a secondary succession.