Waec Model Questions Vol1 2024 Biology Question 36

Practice objective / multiple choice question 36 from the 2024 Waec Model Questions Vol1 Biology examination.

Waec Model Questions Vol1 2024 Biology Objective / Multiple Choice Hard Difficulty
Question 36 WAEC_MODEL_QUESTIONS_VOL1 • 2024 • BIOLOGY • objective

Two amphibian species, X and Y, inhabit stagnant ponds. Species X has a skin surface area of 120 cm² and cutaneous respiration efficiency of 30 %; its body mass is 30 g. Species Y has a skin surface area of 80 cm², efficiency of 25 %, and body mass of 50 g. Their metabolic oxygen demand is 0.3 mg O₂ per gram of body mass per hour. Assuming oxygen uptake (mg O₂·h⁻¹) = surface area × efficiency × dissolved O₂ concentration (C mg L⁻¹), determine the minimum dissolved O₂ concentration each species requires to meet its metabolic demand. Which species can survive in water with the lower dissolved O₂ concentration?

Answer Options

A. Species X requires 0.25 mg L⁻¹; Species Y requires 0.75 mg L⁻¹; therefore Species Y can survive at the lower dissolved O₂.
B. Species X requires 0.30 mg L⁻¹; Species Y requires 0.75 mg L⁻¹; therefore Species X can survive at the lower dissolved O₂.
Correct Answer C. Species X requires 0.25 mg L⁻¹; Species Y requires 0.75 mg L⁻¹; therefore Species X can survive at the lower dissolved O₂.
D. Species X requires 0.20 mg L⁻¹; Species Y requires 0.80 mg L⁻¹; therefore Species X can survive at the lower dissolved O₂.
Correct Answer
C
Correct Option:
Species X requires 0.25 mg L⁻¹; Species Y requires 0.75 mg L⁻¹; therefore Species X can survive at the lower dissolved O₂.

About This Question

This is Waec Model Questions Vol1 2024 Biology Question 36. It is one of the objective questions from the 2024 Waec Model Questions Vol1 Biology examination.

Difficulty level: Hard .

View More Waec Model Questions Vol1 2024 Biology Questions More Waec Model Questions Vol1 Practice Questions Back to Questions

Master the Exam!

You've seen a preview, but there are thousands more questions plus AI tutor to break down complex solutions.

Unlock Full Access Available for Android & Windows
Chat with Support