How do light microscopes differ from electron microscopes? )
A)
Light microscopes can be used to study cells; electron microscopes cannot.
Light microscopes can examine living specimens; electron microscopes
cannot.
B)
Electron microscopes can be used to examine living specimens; light
microscopes cannot.
Light microscopes can magnify a specimen up to 100,000 times; electron
microscopes magnify up to 1500 times.
D)

1. variations in a population of moths allow for some of its members to be able to adapt to environmental changes. the better adapted of the moths will be able to survive the change and thus prevail as the “fittest” of the species. (a) describe three mechanisms in which variation can occur within a species population. (b) explain which mechanism or mechanisms would be responsible for the survival of a population of peppered moths better than white moths in an environment affected by industrial soot. justify your answer.

Which of the following describes a difference when gram-positive bacteria are compared to gram-negative bacteria?

What blood vessels carry blood to the heart? away from the heart?