What happenes during heat transfer within earth? a warmer more dense material sinks b warmer less dense material rises c cooler more dense material rises d cooler less dense material sinks

Apopulation of black bears depends on salmon from a stream for food. if a drought causes the stream to run dry one year, how will this likely impact the black bear population?

Which part of the neuron below is indicated by the arrow, and what is its function? hormones send chemical signals throughout the body to regulate other body processes. hormones are chemical signals that are sent throughout the body to regulate other body processes. hormones send electrical signals throughout the body to regulate other body processes. hormones are electrical signals that are sent throughout the body to regulate other body processes.

Which tool could you see a plant cell? a. a filter b. a microscope c. a microwave d. an electromagnet