Name the Artist: Through The Years?

Questions

Some species of freshwater eels migrate to the Sargasso Sea in the Atlantic Ocean to mate. After laying up to 20 million eggs, the female eel dies. The baby eels hatched from the eggs then make their way back to ----------?

Thirty thousand monkeys were used in the massive three-year effort to classify the various types of ----------?

The oyster is usually ----------. It begins life as a male, then becomes a female, then changes back to being a male, then back to being female. It may go back and forth many times.?

The female American Oyster lays an average of 500 million eggs per year. Usually only one oyster out of the bunch reaches ----------?

Some species of rain forest birds migrate every summer from South America to Canada to ----------?