9 To show that the results from an experiment are valid, a scientist O A. must repeat the experiment multiple times and get the same re OB. must convince 20 other scientists to do the experiment. Oc. must show that the experiment produces different results each OD. must claim that no errors were made during the experiment.

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

Most crimes involve some evidence relating to the human body; for that reason, what related science is frequently used in forensic investigations? a)psychiatry b)physics c)botany d)biology

Which of the following types of stars are dim but can have high surface temperatures? giants main sequence stars supergiants dwarfs