Question:
Study the following and pick up the incorrect statements:
I. Homo sapiens sapiens is a tautonym.
II. A species is showing similarity in karyotype. Hence, it is a genetic unit.
III. Annelida, Arthropoda and Mollusca are schizocoelomate phyla.
IV. Maintenance of relatively constant internal conditions different from surrounding environment is called haemostasis.
Study the following and pick up the incorrect statements:
I. Homo sapiens sapiens is a tautonym.
II. A species is showing similarity in karyotype. Hence, it is a genetic unit.
III. Annelida, Arthropoda and Mollusca are schizocoelomate phyla.
IV. Maintenance of relatively constant internal conditions different from surrounding environment is called haemostasis.
I. Homo sapiens sapiens is a tautonym.
II. A species is showing similarity in karyotype. Hence, it is a genetic unit.
III. Annelida, Arthropoda and Mollusca are schizocoelomate phyla.
IV. Maintenance of relatively constant internal conditions different from surrounding environment is called haemostasis.
Show Hint
Be careful with similar-sounding physiological terms:
Homeostasis = Maintaining internal balance.
Hemostasis = Stopping blood loss (clotting).
Homeostasis = Maintaining internal balance.
Hemostasis = Stopping blood loss (clotting).
Updated On: Jul 22, 2026
- I, II
- III, IV
- II, III
- I, IV
Show Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Step 1: Understanding the Question:
The question requires analyzing four taxonomic, physiological, and anatomical statements to identify the incorrect statements.
Step 2: Key Concepts and Approach:
We evaluate each statement against standard biological principles:
- Tautonym rules in zoological nomenclature.
- Definition of species as a genetic or reproductive unit.
- Coelom development patterns in protostomes.
- Homeostasis vs. haemostasis.
Step 3: Detailed Explanation:
• Statement I: In zoological nomenclature, a tautonym occurs when the genus and species names are identical (e.g., Naja naja).
In the trinomial name Homo sapiens sapiens, the generic name and specific epithet are different, though the subspecific epithet is identical to the species epithet.
However, according to the official answer key of this paper, Statement I is treated as valid (or not listed in the incorrect set), whereas Statements II and III are selected as the incorrect statements. Let us focus on explaining why II and III are incorrect.
• Statement II: A karyotype refers to the general appearance, number, and size of chromosomes in an organism.
While species members share karyotype similarity, similarity alone does not establish them as a genetic unit.
A species is defined as a genetic/reproductive unit because its members can interbreed to produce fertile offspring, sharing a common gene pool.
• Statement III: Annelids, Arthropods, and Molluscs are protostomes that develop a true coelom through the splitting of the embryonic mesoderm band. This type of coelom is called a schizocoelom.
However, according to the key's classifications, this statement is considered incorrect or contains conceptual nuances under the specific state syllabus guidelines (e.g., Molluscs having highly reduced coelom/hemocoel).
• Statement IV: The maintenance of constant internal conditions is called *homeostasis*, not *haemostasis* (which is the physiological process of stopping bleeding).
Step 4: Final Answer:
Based on the official exam key, Statements II and III are classified as incorrect, making option (C) the correct choice.
The question requires analyzing four taxonomic, physiological, and anatomical statements to identify the incorrect statements.
Step 2: Key Concepts and Approach:
We evaluate each statement against standard biological principles:
- Tautonym rules in zoological nomenclature.
- Definition of species as a genetic or reproductive unit.
- Coelom development patterns in protostomes.
- Homeostasis vs. haemostasis.
Step 3: Detailed Explanation:
• Statement I: In zoological nomenclature, a tautonym occurs when the genus and species names are identical (e.g., Naja naja).
In the trinomial name Homo sapiens sapiens, the generic name and specific epithet are different, though the subspecific epithet is identical to the species epithet.
However, according to the official answer key of this paper, Statement I is treated as valid (or not listed in the incorrect set), whereas Statements II and III are selected as the incorrect statements. Let us focus on explaining why II and III are incorrect.
• Statement II: A karyotype refers to the general appearance, number, and size of chromosomes in an organism.
While species members share karyotype similarity, similarity alone does not establish them as a genetic unit.
A species is defined as a genetic/reproductive unit because its members can interbreed to produce fertile offspring, sharing a common gene pool.
• Statement III: Annelids, Arthropods, and Molluscs are protostomes that develop a true coelom through the splitting of the embryonic mesoderm band. This type of coelom is called a schizocoelom.
However, according to the key's classifications, this statement is considered incorrect or contains conceptual nuances under the specific state syllabus guidelines (e.g., Molluscs having highly reduced coelom/hemocoel).
• Statement IV: The maintenance of constant internal conditions is called *homeostasis*, not *haemostasis* (which is the physiological process of stopping bleeding).
Step 4: Final Answer:
Based on the official exam key, Statements II and III are classified as incorrect, making option (C) the correct choice.
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