Aspecies of finch has been studied on one of the geographically isolated galapagos islands for many years. since the island is small, the lineage of every bird for several generations is known. this allows a family tree of each bird to be developed. some family groups have survived and others have died out. the groups that survive probably have: a) interbred with other species b) inherited some advantageous variations c) found new places on the island to live d) been attacked by more predators

Ry was studying two populations of the same species of lizards. one population lived on an island and the other lived on the mainland. both populations were affected by a hurricane that hit the island and the mainland with equal force. a year later, henry was testing the gene frequency and saw a decrease in genetic variation in the island species, but not in the mainland species. which best describes a conclusion he might have reached? gene flow greatly affects small populations, but large populations can recover. genetic drift greatly affects small populations, but large populations can recover. gene flow greatly affects large populations, but small populations can recover. genetic drift greatly affects large populations, but small populations can recover.

Vessels draining the myocardium of the heart, open primarily ,into which chamber?

18. over time, how do sand dunes tend to migrate? a. perpendicular to the movement of the wind b. in the same direction as the wind blows c. toward the wind d. in random directions