Problem 122 - Objective Biology for NEET

Question

Assertion: Binomial system provided by Linnaeus is used by biologist all over the world. Reason: This naming system using a two word format is convenient.

Step-by-Step Solution

Answer

The assertion and reason are correct, and the reason fully supports the assertion. The Binomial system offered by Linnaeus is indeed widely used by biologists globally, primarily due to its convenience and the universal clarity it provides.

Step 1: Understanding The Assertion

The assertion states that: 'Binomial system provided by Linnaeus is used by biologist all over the world.' Binomial nomenclature is a two-part scientific naming system used in biology to universally identify species of organisms. The first part is the genus name and the second part is the species name. The system was invented by Carl Linnaeus in the 18th century.

Step 2: Evaluating the Reason

The given reason is: 'This naming system using a two word format is convenient.' It could be interpreted as implying that the two-word format of the system is simple and more straightforward as compared to other possible naming systems, thus allowing professionals in the field to communicate species information effectively and universally, which may be why it is widely used.

Step 3: Weighing Assertion Against Reason

Considering the ease of use of the Binomial system and its ability to provide a universal code for naming species, it is reasonable to conclude that its convenience, as mentioned in the reason, is why it is widely adopted by biologists worldwide.

Key Concepts

Linnaeus's Classification System

The classification system devised by Carl Linnaeus is foundational to modern biological taxonomy. Linnaeus's system is hierarchical, which means it is structured in a way that organizes living organisms into groups that become progressively more specific. At the broadest level, Linnaeus introduced categories such as kingdoms and classes. As we move down the hierarchy, these categories further divide into orders, families, genera, and finally, species.

His innovation was not just about creating a hierarchy, but also in formalizing a way to name species, which is where binomial nomenclature comes into play. Let's take the example of humans whose scientific name is Homo sapiens. Homo represents the genus, while sapiens is the specific species within that genus. This systematic approach allowed for a standardized way of referencing organisms, which provided clarity and consistency in the communication amongst scientists across the globe. The system also reflects evolutionary relationships, as species grouped together in a genus share a closer common ancestor.

Scientific Naming of Species

Adopting a scientific naming system for species was revolutionary in that it provided a universally accepted language for biologists. Binomial nomenclature, the two-word system established by Linnaeus, consists of the genus name, which is capitalized, and the species name, which is not. The entire scientific name is usually written in italics or underlined if handwritten. The simplicity of this format lies in its specificity and universality.

Since Latin was a language that was universally studied by scholars at the time of Linnaeus, he utilized it to name species, ensuring that the names could be used and understood all over the world, regardless of local language barriers. Indeed, the precision of this naming convention avoids confusion that might arise from the use of common names, which can vary broadly by region or language. For instance, the common barn swallow is known scientifically as Hirundo rustica, a name that precisely identifies it worldwide.

Biology Taxonomy

Biology taxonomy is the science of identifying, naming, and classifying organisms into an organized system. Taxonomists strive to understand the relationships between species, mapping out the evolutionary tree of life. Following the binomial nomenclature, taxonomic classification begins with broad categories like the domain or kingdom and narrows down to phylum, class, order, family, genus, and species.

The work of taxonomy is ongoing; with new species being discovered and molecular biology techniques such as DNA sequencing providing new insights, the tree of life is continually being refined. This systematization not only aids in biological conversation but also is crucial in studying biodiversity, conservation efforts, and understanding the biological history of the planet. As we classify organisms, we gain more than just names – we unearth the connections that bind all forms of life together, revealing the intricate web of life on Earth.