Problem 57 - Objective Biology for NEET

Question

Select the incorrect statement from the following. (a) Each statement in key is called lead. (b) Taxonomic keys are tools that helps in identification based on characterstics. (c) ICZN stands for International Code of Zoological Nomenclature. (d) Ernst Mayr used the system a Nature as the title of his publication.

Step-by-Step Solution

Answer

The incorrect statement is (d): Ernst Mayr used the system a Nature as the title of his publication.

Step 1: Evaluate Statement (a)

The first statement refers to the use of a 'lead' in a taxonomic key. In taxonomy, a 'lead' is indeed a statement about a specific characteristic that helps to identify an organism. Thus, statement (a) is correct.

Step 2: Evaluate Statement (b)

The second statement refers to taxonomic keys as tools for identification based on characteristics. This definition is aligned with the purpose of taxonomic keys, making statement (b) also correct.

Step 3: Evaluate Statement (c)

The third statement pertains to the ICZN. ICZN does indeed stand for International Code of Zoological Nomenclature which is a set of rules and recommendations dealing with the naming of animals, confirming that statement (c) is also correct.

Step 4: Evaluate Statement (d)

Finally, evaluating statement (d) shows that it is incorrect. Ernst Mayr was a biologist known for his work in evolutionary biology and systematics, but he did not use 'Systema Naturae' as the title of his publication. 'Systema Naturae' was the work of Carl Linnaeus, another biologist. Hence statement (d) is the incorrect statement being asked for in this exercise.

Key Concepts

ICZN (International Code of Zoological Nomenclature)

The ICZN, or International Code of Zoological Nomenclature, plays a crucial role in the scientific naming of animals. It sets the rules and standards that govern how new species are named and classified. The ICZN helps ensure that each species gets a unique and universally recognized name. This prevents confusion and makes scientific communication more precise and effective.

Imagine if every scientist used a different name for the same animal! That's why the ICZN is so important; it creates a structured system to avoid such discrepancies. The rules help preserve the historical context of species' names while allowing new discoveries to fit seamlessly into the framework.

• The code outlines how names should be properly formatted.
• Establishes priority rules (older names get precedence).
• Specifies how to publish new names officially.

These guidelines make zoological naming orderly and methodical, thereby supporting researchers worldwide in their work.

Character Identification

Character identification is the process of recognizing distinct features or traits that help in determining an organism's classification. In taxonomy, scientists use a taxonomic key, which consists of a series of choices that lead the user to the correct name of a given item.

Each decision is based on observable characteristics or 'characters' of the organism, such as size, shape, color, or pattern. These characteristics are valuable because they allow detailed comparison between different organisms.

• Identify morphological traits, like shape and size.
• Recognize behavioral patterns, such as feeding habits.
• Use of ecological information, including habitat preference.

This methodical process of character identification not only aids in classification but also enhances understanding of biological diversity and evolutionary relationships.

Ernst Mayr

Ernst Mayr was a prominent 20th-century biologist whose work greatly influenced evolutionary biology, systematics, and the philosophy of biology. His contributions profoundly shaped the field of taxonomy and our understanding of species diversity.

Mayr's most notable concept was the "Biological Species Concept," which defined a species as a group of individuals that can interbreed and produce fertile offspring. This idea helped clarify the meaning of "species" and offered a biological explanation for speciation.

• Developed the Biological Species Concept.
• Emphasized the role of geographic isolation in speciation.
• Contributed to the evolutionary synthesis, integrating genetics and Darwinian evolution.

Mayr's work taught biologists to look beyond simple physical characteristics and consider genetic and evolutionary aspects in their classifications, thus broadening the scope of taxonomy and evolutionary studies.