What is the average for the following set of measurements? 3.1ml,2.7ml,4.6ml,1.9ml,8.7ml a.4.2ml b.21ml c.8.7ml d.3.5ml

The observations of hooke and van leeuwenhoek documenting the existence of microscopic cells formed the basis of what important theory? a. the cell theory stating that all living things are composed of cellsb. the theory of spontaneous generation, which held that life forms could arise spontaneouslyc. the theory of chemotherapy, or use of antimicrobials to destroy pathogenic organismsd. the germ theory of disease and causative agents

If a robot fixed another robot is it a engineer or doctor?

Where do the respiratory and circulatory systems meet? a. in the heart b. in the muscles c. in the lungs d. in the brain