To date fossils outside the range of carbon-14 dating, researchers use indirect methods of establishing absolute fossil age. explain two of these methods, potassium and magnetism shifts

Drugs that act by mimicking the normal substrate of an enzyme, thereby blocking its active site, are called

1 pts A farmer uses triazine herbicide to control pigweed in his field. For the first few years, the triazine works well and almost all the pigweed dies; but after several years, the farmer sees more and more pigweed.

How does food move through the intestines?

10. What can contaminate a river as a result of dredging? a. potash C. placer deposits b. seawater d. muddy sediments

What is one possible reason that Mutation 2 leads to the production of normal blood cells rather than the sickled blood cells?

If a mother carries a recessive allele for a genetic disorder such as cystic fibrosis under what circumstances will her children inherit the disorder

Explain how compaction is important in the formation of coal

Aristotle was a true scientist

What are the four major ocean basins? Are these basins connected?

Why is cellular respiration considered an efficient process