Photo AI
Organisms use various mechanisms to maintain their internal environment within tolerance limits - HSC - SSCE Biology - Question 29 - 2023 - Paper 1
Question 29
Organisms use various mechanisms to maintain their internal environment within tolerance limits. (a) Outline a physiological adaptation in endotherms which assists ... show full transcript
Worked Solution & Example Answer:Organisms use various mechanisms to maintain their internal environment within tolerance limits - HSC - SSCE Biology - Question 29 - 2023 - Paper 1
Step 1
Outline a physiological adaptation in endotherms which assists in maintaining their internal environment.
Answer
Endotherms can undergo vasoconstriction to decrease blood flow and volume, which reduces heat loss through the skin. This physiological adaptation helps maintain their internal body temperature.
Step 2
Explain TWO adaptations in plants that help to maintain water balance.
Answer
-
Sunken Stomates: Stomata may be sunken in pits in the epidermis, which traps moisture above the stomatal opening. This adaptation reduces water loss by minimizing evaporation.
-
Thick Waxy Cuticle: A thick cuticle acts as a barrier to evaporation and reflects sunlight, helping to conserve moisture within the plant and maintaining a lower internal temperature.