Which of the following vertical zones of a large coral reef has ...

[Yi-Chen]

Which of the following vertical zones of a large coral reef has light intensity of about 60 of the surface intensity?
 
  A) From a few centimeters to a few meters
  B) From a few meters to 20 meters
  C) From 20 meters to 50 meters
  D) From 50 meters to 150 meters
  E) Below 150 meters

Question 2

Researchers estimate that the Pacific Ocean contains at least 46 ________ pounds of floating microplastic pieces (microbeads) that originate from hand cleaners, exfoliating facial scrubs, and toothpaste, that are known to transport pollutants and be
 
  eaten by fish. A) hundred
  B) thousand
  C) million
  D) billion
  E) trillion

[thall411]

Answer to Question 1

A

Answer to Question 2

C