What does a animal cell and a virus have in common?

In attempt to solve the working problems created by the industrial revolution, the united states and many countries in europe considered and/or adopted

Ageologist determines that a sample of a mineral cant be scratched by a steel nail but can be scratched by a masonry drill bit based on this information the sample mineral has to be softer than

The organelle pictured is found in cells of and is theorized to have once been an independent organism.