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Difficulty: HardVertebrates: Poikilothermic Classes (Pisces, Amphibia, Reptilia)

A biological survey of poikilothermic vertebrates identifies three distinct species based on their anatomical and physiological traits:

- Species X exhibits a two-chambered heart consisting of one atrium and one ventricle, excretes ammonia as its main nitrogenous waste, and breathes via gills.
- Species Y possesses a three-chambered heart with an incomplete ventricular septum, excretes uric acid, and lays shelled (cleidoic) eggs.
- Species Z undergoes metamorphosis during development, possesses a simple three-chambered heart without any ventricular division, and utilizes moist skin for cutaneous gas exchange.

Which of the following lists the correct scientific names corresponding to Species X, Species Y, and Species Z, respectively?

  1. A
    Bufo regularis, Agama agama, and Tilapia zillii
  2. Tilapia zillii, Agama agama, and Bufo regularisAnswer
  3. C
    Tilapia Zillii, Agama agama, and bufo regularis
  4. D
    Agama agama, Tilapia zillii, and Bufo regularis

Answer

Species X is the fish Tilapia zillii, Species Y is the reptile Agama agama, and Species Z is the amphibian Bufo regularis.
The combination of Tilapia zillii (bony fish), Agama agama (reptile), and Bufo regularis (amphibian) accurately aligns with the physiological profiles of Species X, Y, and Z respectively. Fish possess a 2-chambered heart and gill respiration; reptiles possess a 3-chambered heart with an incomplete septum, uricotelic excretion, and cleidoic eggs; and amphibians possess a 3-chambered heart, undergo metamorphosis, and exhibit cutaneous respiration.

Step-by-Step Solution

1
Analyze the circulatory, excretory, and respiratory features of Species X
Species X has a 2-chambered heart (one atrium, one ventricle), excretes ammonia, and breathes using gills, which uniquely identifies it as belonging to class Pisces (e.g., Tilapia zillii).
Fish possess a single-circuit circulatory system with a two-chambered heart.
2
Analyze the anatomical and reproductive traits of Species Y
Species Y has a 3-chambered heart with an incomplete ventricular septum, excretes uric acid, and lays cleidoic (shelled) eggs, which are characteristic features of class Reptilia (e.g., Agama agama).
Reptiles have adapted to fully terrestrial life via uricotelic excretion, cleidoic eggs, and partial ventricular separation.
3
Analyze the developmental and respiratory features of Species Z
Species Z undergoes metamorphosis, has a 3-chambered heart without a septum, and uses skin for respiration, which characterizes class Amphibia (e.g., Bufo regularis).
Amphibians undergo dual-stage life cycles and rely heavily on cutaneous gas exchange.
4
Verify scientific binomial nomenclature formatting
The genus must begin with a capital letter and the specific epithet with a lowercase letter (e.g., Tilapia zillii, Agama agama, Bufo regularis).
Standard botanical and zoological taxonomy strictly enforces binomial nomenclature capitalization.

Key Concept

Comparative anatomy and physiological adaptations across poikilothermic vertebrate classes (Pisces, Amphibia, Reptilia)
Estimated Time:1m 30s
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Topics

Vertebrates: Poikilothermic Classes (Pisces, Amphibia, Reptilia)

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