Waec Model Questions Vol1 2019 Biology Question 9

Practice objective / multiple choice question 9 from the 2019 Waec Model Questions Vol1 Biology examination.

Waec Model Questions Vol1 2019 Biology Objective / Multiple Choice Medium Difficulty
Question 9 WAEC_MODEL_QUESTIONS_VOL1 • 2019 • BIOLOGY • objective

A frog inhabiting a 35 °C environment can dissipate excess heat by evaporative cooling. Its skin surface area is 0.02 m² and the latent heat of vaporisation of water is 2.4×10⁶ J·kg⁻¹. Heat loss by radiation and convection is 5 W per °C above the frog's optimum body temperature of 25 °C. Calculate the minimum rate of water loss (in kg·s⁻¹) required for the frog to maintain its body temperature.

Answer Options

Correct Answer A. 2.1×10⁻⁵ kg·s⁻¹
B. 2.5×10⁻⁵ kg·s⁻¹
C. 3.0×10⁻⁵ kg·s⁻¹
D. 1.8×10⁻⁵ kg·s⁻¹
Correct Answer
A
Correct Option:
2.1×10⁻⁵ kg·s⁻¹

About This Question

This is Waec Model Questions Vol1 2019 Biology Question 9. It is one of the objective questions from the 2019 Waec Model Questions Vol1 Biology examination.

Difficulty level: Medium .

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