An electron microscope would be used if

The vertebrae and cartilaginous discs of the spine are parts of which body system?

Darwin noticed that birds that were good at finding scarce food in the winter had a better chance of surviving and producing offspring. What did he call this struggle for existence?

What type of rock can be found in river beds?

The purpose of menstruation is:

If someone asked you how wide your desk is, how would you measure it? Would you measure using inches, centimeters, feet, yards, or meters? Write why you selected this unit of measure

If a characteristic is found in bacteria, fungi, pine trees, snakes, and humans, when did it most likely evolve?

Which property allows objects that do not produce their own light to be seen

What is an example of recombinant dna technology?

How many chromosomes do humans with down syndrome have?

Which trophic level has the least amount of energy available for the next highest trophic level? a. secondary consumerb. omnivorec. decomposerd. producer