Problem 121 - Objective Biology for NEET

Question

Assertion: Scientific names of all organisms are based on agreed principles and criteria provided by ICBN. Reason: ICBN is International code for biological nomenclature.

Step-by-Step Solution

Answer

The assertion is incorrect while the reason is correct. ICBN provides the naming principles for algae, fungi, and plants, but not all organisms.

Step 1: Identify the Assertion and Reason

The assertion states that the scientific names of all organisms are based on principles and criteria provided by ICBN. The reason given is that ICBN is the International Code for Biological Nomenclature.

Step 2: Understand ICBN

ICBN or International Code of Nomenclature for algae, fungi, and plants is an agreement among botanists and biologists worldwide to provide a stable and universal framework for the naming of organisms. This ensures a certain level of uniformity in scientific names.

Step 3: Validate the Assertion with the Reason

The statement provided in the reason correctly identifies the ICBN's function. However, the assertion is only partially correct. The ICBN is responsible for naming of algae, fungi, and plants, but not 'all organisms'. Other organisms like animals have their own respective codes for nomenclature.

Key Concepts

Understanding ICBN

The International Code of Botanical Nomenclature (ICBN) plays a vital role in the scientific community by providing standardized rules for the naming of plants, algae, and fungi. This prevents confusion that might arise from having different names for the same species, and ensures that each organism is recognized by a unique scientific name.

Despite its importance, ICBN does not cover all life forms. It specifically deals with the nomenclature of plants, algae, and fungi. For the naming of animals and microorganisms, separate nomenclature codes exist, such as the International Code of Zoological Nomenclature (ICZN) for animals.

The Significance of Scientific Names of Organisms

In biology, the scientific names of organisms are more than just labels. They provide a universal language for scientists around the world, transcending linguistic barriers. Scientific names are binomial, consisting of two parts: the genus name and the species name, such as in Homo sapiens for humans. This binomial system, introduced by Carl Linnaeus, allows scientists to effectively communicate about organisms without misunderstanding.

These names are based on Latin or Latinized Greek, and they often describe a distinctive feature of the organism or honor a person in the field of science. The objective is to have a consistent, informative, and globally accepted name for every organism.

International Code of Nomenclature for Algae, Fungi, and Plants

The International Code of Nomenclature for algae, fungi, and plants (ICN), formerly known as ICBN, is the set of regulations that governs the scientific naming of these groups of organisms. The code is periodically updated to reflect the consensus and changes in the scientific understanding of these organisms.

One of the critical components of the ICN is priority, which means that the first published name for an organism is the one that should be used. There are also rules concerning synonymy, where different names may have been used for the same organism, ensuring that only one accepted name is used going forward. The ICN helps maintain historical continuity and avoids duplicates, further stabilizing the nomenclature of these life forms.