11. The figure to the right illustrates an Antaretio marine food chain, with arr
ID: 253602 • Letter: 1
Question
11. The figure to the right illustrates an Antaretio marine food chain, with arrows indicating eneruy flow. Which of the following populations of organisms would you expect to have the MOST total biomass in the ecosystem? A) Baleen whales B) Krill C) Phytoplankton 12. Phytoplankton convert energy from solar radiation to chemical energy through photosynthesis. How much of this energy is available to a baleen whale that eats krill? A) All of the energy from the sun that reaches the earth's surfaces B) All of the energy the phytoplankton is able to gain through photosynthesis C) Only the energy the phytoplanktion has left from photosynthesis after it has used some of this energy for metabolic processes D) All of the energy the krill gets from eating phytoplankton E) Only the energy the krill has left from eating the phytoplankton after it has used some of n eating the phytoplankton afer i has used some of this energy for metabolic processes. 13. Zebra mussels invaded the Great Lakes region, and spread throughout the lakes. When the Quagga mussel (another invasive species that competes with the Zebra mussel) were introduced A) Both the fundamental and realized niche of Zebra mussels got smaller after the addition B) The fundamental niche of Zebra mussels remained the same, but the realized niche of the range of Zebra mussels shrank to only include lakes where the Quagga mussel was not found Which of the following statements is correct? of Quagga mussels to the ecosystem Zebra mussels shrank after the addition of Quagga mussels to the ecosystem Quagga mussels to the ecosystem mussels remained the same after the addition of Quagga mussels to the ecosystenm the introduction of the Quagga mussel C) Both the fundamental and realized niche of Zebra mussels got larger after the addition of D) The fundamental niche of Zebra mussels got smaller, but the realized niche of Zebra E) There was no change to either the fundamental or realized niche of the Zebra mussel afterExplanation / Answer
11] Option [C] Phytoplankton
Reason-- The producers form the largest biomass in any ecosystem.
12] Option [E] Only the energy the krill has left from eating the phytoplankton after it has used some of this energy for metabolic processes.
Reason-- In a food chain, the available energy decreases as we move higher up in the trophic level
13] Option [ A] Both the fundamental and realised niche of zebra mussel got smaller after the addition of quagga mussels to the ecosystem.
Reason-- Fundamental niche is the entire set of conditions in an ecosystem in which a species lives and reproduces.
Realised niche is the set of conditions actually used by that species in the ecosystem.
Both these decrease for the zebra mussels after the introduction of quagga mussels into the ecosystem.
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