Use what you know about fossils to choose the correct answers from the drop-down menus to complete each statement. If the same organism appears on two different continents, this is evidence of
.

Fossils show how organisms change, or
, over time.

Fossils provide a record of animals that are
, or no longer living.

Mike was adopted, and his biological family history is unknown. although he is healthy, he would like some understanding of his genetic makeup, including potential health risks and genes that he could pass on to his children. mike has heard about commercial laboratories that can compare segments of your dna to those of people with common hereditary diseases in order to give you some idea of how susceptible you are to the diseases. the results of these types of tests are highly inconclusive. if mike's dna showed that he shares similarities in a segment of dna with people who have a given disease, his chances of developing that disease or passing it on to his children may be slightly elevated, but they are not 100 percent. these tests can cost more than $2,500 and are not covered by many insurance companies. do you think that mike should undergo the genetic tests? explain your answer. what are the potential pros and cons of having such tests done? describe how the availability of these genetic tests might affect the frequency of genetic diseases in individuals and populations.

What organelle other than the nucleus houses dna in a eukaryotic cell?

Describe how a student should adjust the microscope to see the cells on a slide more clearly?