The relationship between the protistan zooxanthellae and the ...

[humphriesbr@me.com]

The relationship between the protistan zooxanthellae and the polyps of reef-building corals is best described as a/an ________.
 
  A) facultative ectoparasitism
  B) facultative commensalism
  C) obligate endoparasitism
  D) mutualistic symbiosis
  E) obligate commensalism

Question 2

Judge the following sentence according to the criteria given below: Invasive species can wreak ecological havoc by outcompeting and dominating native populations BECAUSE they lack predators or other natural controls in their new habitats.
 
  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.

[nixon_s]

Answer to Question 1

D

Answer to Question 2

A

[humphriesbr@me.com]

TY

[nixon_s]

You're welcome