If the atmosphere did not contain an ozone layer, which of the following could happen?

Usha is giving a presentation on the cardiovascular system. one of her slides shows a diagram of the blood moving from the heart to the arms and legs. which type of circulation is the slide illustrating? systemic circulation pulmonary circulation systolic circulation diastolic circulation

Which organisims can cause diseases a. micro organisims b. multicellular organisnims c. both d. neither

Motorcyclists may have to suddenly change direction when encountering a. potholes and reflective markers b. yellow lights c. pavement seams and railroad crossings d. strong winds