vintage scientist checking a book and his test tube findings
Young student wearing a mask with books and test tube
CU School children watching at test tube while working in laboratory
Female teacher wearing face mask holding test tube at laboratory at school
Diverse male teacher and schoolchildren studying plant in test tube in school classroom
Blood samples in a test-tube centrifuge. Bunch of tubes in a lab environment. Blood samples in a test-tube centrifuge. Bunch of tubes with red liquid inside in a laboratory interior blurred by camera depth of field
Blood samples in a test-tube centrifuge. Bunch of tubes in a lab environment. Blood samples in a test-tube centrifuge. Bunch of tubes with red liquid inside in a laboratory interior blurred by camera depth of field.
Scientist placing a red liquid sample with micro pipette into a test tubes.
Scientist placing a red liquid sample with micro pipette into a test tubes.