Identify structure A and describe its function

Select the situation bellow that would produce a total displacement of zero. a. a trip to the moon and then to mars b. a horse galloping from one end of a field to another c. the criss-crossing path of a bug as it flies from flower to flower d.a round-trip ride to school and back

What is the cause hearing loss in human being

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.