Question

truth or false
______16. Land organisms can be buried by mudslides, volcanic ash, or sand to eventually become fossilized.
_______ 17. Cross-cutting relationships helps geologists to determine the older and younger of two rock units.
_______ 18. Time is missing in a geologic section when there is an unconformity.
_______ 19. The largest mass extinction occurred at the end of the Cenozoic, when the dinosaurs died out.
_______ 20. All isotope pairs can be used to date any geological materials.
_______ 21. About fifty percent of all living organisms become fossils.
_______ 22. Changes in populations over time is biological evolution.
_______ 23. Prokaryotes are different from eukaryotes because they have a nucleus.
_______ 24. Present day life forms evolved from earlier life forms.
_______ 25. There is fossil evidence that modern horses evolved from an earlier animal.

Answer 1

Answer:

16) true

17) true

18) true

19) false all mass extinctions marks the end of the Cretaceous Period.

20) true

21)not sure but here is some reasons students discovered that living things can die and decay. Soft parts are more likely to decay than hard parts. For this reason, the most common fossils are bones, teeth, shells, and the woody stems of plants. 

22) true

23) eukaryotes have nucleus and prokaryotes doesn't.

24) true

25)true they evolved from eohippus