9. Dr. Wilson discovers a new chemical that he predicts will increase energy levels in hamsters. He designs an experiment to test his prediction
Dr. Wilson
the 12 hamsters into two equal groups. He gives one group of
hamsters the chemical but does not give the chemical to the other group. He keeps
everything else about the hamsters' living environment the same.
Over the next month, Dr. Wilson measures the time that the hamsters spend running on
their exercise wheels each day. He then calculates averages for these measurements,
which are shown in the table.
The data that Dr. Wilson collects during his experiement

easy

explanation:

the two answers are a, the population of birds with large beaks will increase on the island, and c, the trait for large beaks will be passed on to future generations through natural selection. the reason for that is because if the birds that have beaks developed for eating small seeds lose all of their food, they will go hungry and eventually starve because they physically cannot eat the large seeds, therefore making the population of large beaked birds higher. also, if the trait of large beaks are dominant on the island over small beaks, then over time the large beaked birds will reproduce more and more, while the smaller beaked birds will reproduce less and less because they can't survive with the food provided. that leads to the trait of small beaks disappearing and the trait of large beaks taking over the island.