2024HSCShort answer

Q31 (c)

2 marks

Question

A study monitored the changes in the body temperature of a kookaburra (an Australian bird) and a human over a 24-hour period. The results of the study are shown in the graph.

Outline an adaptation that may lead to an increase in the kookaburra’s body temperature during the inactive period.

Uncropped source page 32 for question 31.c; requires human review and cropping — Reviewed visual · source page 32

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Solution

Criteria	Marks
Outlines an adaptation leading to heat generation or retention	2
Provides some relevant information	1

Sample answer:

The kookaburra can raise its temperature by fluffing up feathers which traps a layer of warm air between the feathers and the body. This retains heat.

Supplied marking guidance · human reviewed

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Syllabus alignment

Module 8 · Non-infectious Disease and Disorders

HomeostasisInvestigate behavioural, structural, physiological, hormonal, neural and plant water-balance mechanisms.

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