Aparticular species of fish were split by the formation of the isthmus of panama a long time ago. the fish developed changes in their genes to adapt to the new environment and became two different species. what is this process called? a.) allopatric speciation b.) sympatric speciation c.) gametic isolation d.) behavioral isolation e.) mechanical isolation

Radiometric dating is used to tell the absolute age of materials by studying the decay rate of radioactive isotopes. the decay rates of isotopes are constant and are expressed as .

For this question look at the hydropic diagram water that is heated by the sun evaporates. select the number that represents it.

Several bird species feed in a certain species of tree. each bird species feeds in a different part of the tree. which statement is true of these bird species? a. they have adapted to different niches due to competition b. they have a carnivorous relationship with the tree species. c. they have adapted to different niches due to predation d. they have a symbiotic relationship with the tree species.