as6 wrote:
Can Some one please explain how the answer is B and why not E for last question ? The passage does not say anything about the importance of food.
as6 welcome to the club
Which of the following can be inferred from the passage about the
particulate matter that is carried down from the surface of the ocean?
first find where we have the "particuate matter" in the entire para !!
"Most deep-sea faunas rely for food on
particulate matter ultimately derived from photosynthesis, falling from above."
"Research has demonstrated that advective flow, which originates near the surface of the ocean where suspended
particulate matter accumulates, transports some of that matter and water to the vents. Estimates suggest that for every cubic meter of vent discharge, 350 milligrams of
particulate organic material would be advected into the vent area. Thus, for an average-sized vent, advection could provide more than 30 kilograms of potential food per day."
in the second para the author intoroduces 2 possible explanations for nutrition : chemo and advectio
in the same para we get the positives toads chemo
in the third para we get the limitations of chemo explanation : by stating the chemo is not an adquate explanayion and thus an adequate source of food
in the 4th para the author states : "advection is a more likely
alternative food source. "
and what does advectio involve ?? usage of particulate matter !!! so isnt this indirectly suggesting us that "oarticaulate matter" may be an alternative souce of food !!
(A) It is the basis of bacterial chemosynthesis in the vents.
NO MENTION
(B) It may provide an important source of nutrition for vent faunas.
- CORRECT
(C) It may cause the internal temperature of the vents to change significantly.
- NO MENTION
(D) It is transported as large aggregates of particles.
- This was the second closest answer. As the 4th para states ": for every cubic meter of vent discharge, 350 milligrams of particulate organic material would be advected into the vent area. Thus, for an average-sized vent, advection could provide more than 30 kilograms of potential food per day. "
But the "large" aggregate was a throw in this !!! second best answer
(E) It contains hydrogen sulfide
- The huydro sulphide was a possibe explanation for " chemo" ...but we have no link between chemo and "particulate matter"