What acts as a on and off switch for translation

Which system revise and send electrical signals throughout the body

Which type of organism is missing from the food web seen in the illustration? primary consumers decomposers primary producers secondary consumers

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