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 one of the objective questions from the 2022 Waec Model Questions Vol1 Biology examination.

Difficulty level: Hard .

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