The depth to which a bivalve can bury itself depends on the ...

[Mollykgkg]

The depth to which a bivalve can bury itself depends on the ________.
 
  A) composition of the sediment
  B) length of its siphon
  C) oxygen content of the sediment
  D) turbidity of the surface water
  E) wave frequency and water velocity

Question 2

Judge the following sentence according to the criteria given below: Some chemicals have been classified as persistent organic pollutants BECAUSE of their toxicity, persistence, and propensity for accumulating in food chains.
 
  A) The assertion and the reason are both correct, and the reason is valid.
  B) The assertion and the reason are both correct, but the reason is invalid.
  C) The assertion is correct but the reason is incorrect.
  D) The assertion is incorrect but the reason is correct.
  E) Both the assertion and the reason are incorrect.

[jjorrostieta]

Answer to Question 1

B

Answer to Question 2

A

[Mollykgkg]

Excellent

[dantucker]

Gracias!