Waec Model Questions Vol1 2020 Biology Question 4

Practice objective / multiple choice question 4 from the 2020 Waec Model Questions Vol1 Biology examination.

Waec Model Questions Vol1 2020 Biology Objective / Multiple Choice Medium Difficulty
Question 4 WAEC_MODEL_QUESTIONS_VOL1 • 2020 • BIOLOGY • objective

A small mammal has a basal metabolic rate that generates 5 kJ of heat per hour. Heat is lost by convection at a rate of 0.8 kJ h⁻¹ °C⁻¹ multiplied by the temperature difference between body (38 °C) and ambient (10 °C), and by evaporative cooling at 0.5 kJ per gram of water evaporated. The animal can evaporate up to 2 g of water per hour. Determine whether the animal can maintain its body temperature under these conditions, and if not, calculate the heat deficit per hour (kJ).

Answer Options

A. No; deficit ≈25 kJ h⁻¹
Correct Answer B. No; deficit ≈18 kJ h⁻¹
C. Yes; deficit ≈0 kJ h⁻¹
D. No; deficit ≈10 kJ h⁻¹
Correct Answer
B
Correct Option:
No; deficit ≈18 kJ h⁻¹

About This Question

This is Waec Model Questions Vol1 2020 Biology Question 4. It is a objective / multiple choice question from the 2020 Waec Model Questions Vol1 Biology examination.

Difficulty level: Medium .

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