Study the diagram of the geologic time scale.

A time scale measured in Millions of years ago or M Y A. Cenozoic Era includes Quaternary Period, 0 to 1.6 M Y A, and Tertiary Period, 1.6 to 66.4 M Y A. Mesozoic Era includes Cretaceous Period, 66.4 to 144 M Y A, Jurassic Period, 144 to 208 M Y A, Triassic Period, 208 to 245 M Y A. Paleozoic Era includes Permian Period, 245 to 286 M Y A, Carboniferous Period, 286 to 360 M Y A, Pennsylvanian Period (286 to 320 M Y A), Mississippian Period, 320 to 360 M Y A, Devonian Period, 360 to 408 M Y A, Silurian Period, 408 to 438 M Y A, Ordovician Period, 438 to 508 M Y A, Cambrian Period, 508 to 570 M Y A, 570 M Y A and older is the Precambrian Period.

Which method is most likely used to identify what happened before the start of the Paleozoic era?

Scientists study fossils from the Jurassic period.
Scientists observe index fossil records of the Mesozoic era.
Scientists examine fossil evidence during the Precambrian time.
Scientists explore the emergence of mammals and humans in the Cenozoic era.

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 are the 3 types of artificial cloning

Which is a function of vascular tissue? a. to perform photosynthesis b. to transport water and nutrients c. to absorb minerals and sugar d. to interact with soil fungi