3. the algae in thermal springs, such as old faithful in yellowstone park, have temperatures above 100c. does this mean the optimal temperature for different enzymes in different organisms may vary?

The optimal temperature for different enzymes in different organisms may vary and it happens because some of the organisms change their proteins via mutations in order to adapt to a certain environment. For example, algae have developed a special type of heat resistance protein that helps them survive in these extreme conditions.

he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?