Match the term with the appropriate definition.

1. continental shelf
2. benthic zone
3. continental slope
4. abyssal plain
5. photic
6. disphotic
7. aphotic
8. phytoplankton and fish
9. lantern-fish and mid-water jellyfish
10. bacteria and anglerfish

Why does earth contain such diverse life forms?

The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.

Which best explains why there are 64 possible codons in the genetic code and only 20 amino acids that make protiens of living organisms on earth