How could a worldwide increase in temperature effect organisms?

Global warming, increasing temperature of the Earth, will permanently affect habitats which will result in multiple species moving to find a cooler place.The species deserting their home where they have been for thousands of years will unbalance the ecosystem causing long lasting damaging affects on Earth.

Wildlife is dependent on the right habitats with proper temperatures, fresh water, food, resources, and places to raise the young. If climate changes occur, the natural resources such as water and plants would not be able to thrive as well in different weather conditions that differ from it regular climate. If the natural resources do not continue to thrive and expand, then surrounding habitats begin to die due to the lack of sufficient nutrients. Some animals are able to adapt to such changes by finding other resources to fulfill their needs or they'll be able to travel to a place with climate that is sufficient. Others are simply too weak without these resources to be able to adapt or travel. Temperature increase can cause species to become extinct or endangered. It truly has a big effect on organisms. 

I hope this helps:)

They both determine the exact age of rocks.

Leaves specifically the gas exchange between plants and the environment. while plants undergo photosynthesis, they also partake in cellular respiration. respiration is the process that happens in the leaves of plants.