Neco Model Questions Vol1 2018 Biology Question 1

Practice objective / multiple choice question 1 from the 2018 Neco Model Questions Vol1 Biology examination.

Neco Model Questions Vol1 2018 Biology Objective / Multiple Choice Hard Difficulty
Question 1 NECO_MODEL_QUESTIONS_VOL1 • 2018 • BIOLOGY • objective

A desert insect experiences a 40 % increase in cuticle thickness and a 20 % decrease in its metabolic rate relative to a closely related species living in a humid environment. Under the humid conditions the insect loses \(100\ \text{mg}\) of water per day. Water loss is directly proportional to metabolic rate and inversely proportional to cuticle thickness. (i) Calculate the water loss of the desert insect per day. (ii) Considering each change separately (i.e., first only the thickness change, then only the metabolic change), determine which adaptation contributes more to the reduction in water loss.

Answer Options

Correct Answer A. Water loss ≈ 57.14 mg day⁻¹; the increased cuticle thickness contributes more to the reduction.
B. Water loss ≈ 71.43 mg day⁻¹; the decreased metabolic rate contributes more to the reduction.
C. Water loss ≈ 57.14 mg day⁻¹; the decreased metabolic rate contributes more to the reduction.
D. Water loss ≈ 45.00 mg day⁻¹; the increased cuticle thickness contributes more to the reduction.
Correct Answer
A
Correct Option:
Water loss ≈ 57.14 mg day⁻¹; the increased cuticle thickness contributes more to the reduction.

About This Question

This is Neco Model Questions Vol1 2018 Biology Question 1. It is one of the objective questions from the 2018 Neco Model Questions Vol1 Biology examination.

Difficulty level: Hard .

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