Certain bacteria live in plant roots and receive sugars from the plants. The bacteria provide a source of useful nitrogen for the plants. This best describes which type of relationship?

Match the types of competition to their descriptions

Which blood cell spend most of their time in the lymphatic system?

Which statements describe resources? one of the factors people use when deciding where they will live is the availability of resources. renewable resources have little value for people. resources are unevenly distributed throughout the world. energy is the world resource which has the highest use. the use of nonrenewable resources has decreased in recent history. the use of resources is evenly distributed throughout the world. the world's oil supply will last for the next forty years if its use continues as expected.