Petrels (A Flying and Diving Seabird)are Thought to Be One

Multiple Choice

Petrels (a flying and diving seabird) are thought to be one of the closest living relatives to penguins.What type of genes would be most likely to exhibit different expression patterns between these species?

A) Genes controlling skeletal development.
B) Genes regulating the digestive tract.
C) Genes regulating salt water tolerance.
D) Genes controlling organ development.