Two organisms (X and Y) live in an estuary and maintain physiological function from the freshwater end to the seawater end of the estuary - HSC - SSCE Biology - Question 20 - 2018 - Paper 1
Question 20
Two organisms (X and Y) live in an estuary and maintain physiological function from the freshwater end to the seawater end of the estuary. The graph shows the salt c... show full transcript
Worked Solution & Example Answer:Two organisms (X and Y) live in an estuary and maintain physiological function from the freshwater end to the seawater end of the estuary - HSC - SSCE Biology - Question 20 - 2018 - Paper 1
Step 1
A. X exhibits enantiostasis and homeostasis.
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Answer
This statement is accurate. Organism X, living in varying salinity conditions, is likely to adapt its internal salt concentration, indicating enantiostasis, while maintaining a stable internal environment, fulfilling homeostasis.
Step 2
B. Y exhibits enantiostasis and homeostasis.
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Answer
This is incorrect. While organism Y may also adapt, the data presented suggests it might possess a different physiological response compared to X.
Step 3
C. X exhibits homeostasis but not enantiostasis.
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Answer
This statement misrepresents organism X's adaptation abilities. The evidence shows that it likely employs both strategies.
Step 4
D. Y exhibits homeostasis but not enantiostasis.
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Answer
This option is likely incorrect given the reliance of organism Y on varying salinity. It may not strictly exhibit homeostasis.
