- An organism having heart for circulation, excretes through green glands. It has several ganglia and tactile organs on its body and its larval form is very different than its adult form. This organismis most likely to respire by:
A) exchanging oxygen and carbon dioxide through an extensive tracheal system.
B) gaseous exchange over thinner areas of cuticle or by gills
C) an efficient tracheal system that delivers oxygen directly to the tissues
D) a double transport system, where the circulating fluid contains a dissolved respiratory pigment.
Choose the correct option.
(1) A and C (2) Only D
(3) Only B (4) B and D
Introduction
An organism described as having a heart (for circulation), green glands (excretion), ganglia, tactile organs, and a larval form distinct from its adult form fits the description of crustaceans (like crabs or lobsters). Understanding their respiration provides insights into their physiology.
Respiration in Such Organisms
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Gaseous exchange occurs through thinner areas of the cuticle or specialized gills that protrude into the water, allowing oxygen to diffuse in and carbon dioxide to diffuse out.
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Because the cuticle is often impermeable, the gills serve as the primary site for gas exchange.
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These animals also have a closed circulatory system with a heart that pumps a circulating fluid hemolymph containing a dissolved respiratory pigment (hemocyanin or hemoglobin), which transports oxygen efficiently.
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This combination of gas exchange over surfaces and oxygen transport in blood characterizes their respiration.
Evaluating the Answer Options
Option Description Correctness A) Exchange by extensive tracheal system Typically found in insects, not crustaceans with green glands Incorrect B) Gas exchange over thin cuticle or gills Typical for crustaceans and related organisms Correct C) Efficient tracheal system delivering oxygen directly Characteristic of insects only Incorrect D) Double transport system with respiratory pigment Describes circulatory oxygen transport system present in crustaceans Correct
Best Choice
The correct answer is:
(4) B and D
Summary Table
Respiration Feature Presence in Organism Extensive tracheal system No Gas exchange over thin cuticle or gills Yes Efficient tracheal delivery system No Circulatory oxygen transport system Yes
Conclusion
The organism is most likely to respire by:
(4) Gas exchange over thinner areas of cuticle or by gills AND a double transport system where circulating fluid contains respiratory pigment
Would a detailed exploration of respiratory adaptations in crustaceans versus insects be helpful next?
The organism described, having a heart for circulation, green glands for excretion, multiple ganglia and tactile organs, and a larval form very different from the adult (characteristic of crustaceans), most likely respires by:wikipedia+5
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Gaseous exchange over thinner areas of cuticle or by gills.
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A double transport system where the circulating fluid contains a dissolved respiratory pigment.
Thus, the correct option is:
(4) B and D
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1 Comment
Kirti Agarwal
September 25, 2025Statement B and D