Waec Model Questions Vol1 2022 Biology Question 9

Practice objective / multiple choice question 9 from the 2022 Waec Model Questions Vol1 Biology examination.

Waec Model Questions Vol1 2022 Biology Objective / Multiple Choice Hard Difficulty
Question 9 WAEC_MODEL_QUESTIONS_VOL1 • 2022 • BIOLOGY • objective

Two mammals, A and B, live in the same cold environment. Species A has a body surface area of 0.8 m², fur thickness of 2 mm and thermal conductivity of its fur 0.04 W m⁻¹ K⁻¹. Species B has a surface area of 1.2 m², fur thickness of 5 mm and conductivity 0.03 W m⁻¹ K⁻¹. Assuming a constant core‑to‑ambient temperature difference of 20 °C and using the heat‑loss formula $Q = k\,A\,\Delta T / d$, which species loses less heat and by what factor?

Answer Options

A. Species B; about 200 W (≈63 % of species A's loss)
B. Species B; about 100 W (≈31 % of species A's loss)
Correct Answer C. Species B; about 144 W (≈45 % of species A's loss)
D. Species B; about 250 W (≈78 % of species A's loss)
Correct Answer
C
Correct Option:
Species B; about 144 W (≈45 % of species A's loss)

About This Question

This is Waec Model Questions Vol1 2022 Biology Question 9. It is a objective / multiple choice question from the 2022 Waec Model Questions Vol1 Biology examination.

Difficulty level: Hard .

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