Problem 123 - Objective Biology for NEET

Question

Assertion: Earliest classifications were based on the uses of various organisms. Reason: In early days human beings needed to find sources for their basic needs of food, clothing and shelter.

Step-by-Step Solution

Answer

True. The assertion is related to the reason. Early humans classified organisms based on their uses to fulfill their basic needs such as food, clothing, and shelter.

Step 1: Understanding the Assertion

The assertion discusses that classifications of organisms in the past were based on their uses. This implies that humans classified organisms depending on how they could benefit from them.

Step 2: Understanding the Reason

The reason given provides information on the needs of early humans, which included food, clothing, and shelter. To fulfill these basic needs, they needed to find suitable sources, which were likely organisms.

Step 3: Correlating the Assertion with the Reason

After understanding both the assertion and reason, it can be seen that they are related. Early humans classified organisms based on their uses to fulfill their needs for food, clothing, and shelter. Therefore, the assertion and reason are coherent.

Key Concepts

The Origin and Evolution of Taxonomy

The science of classifying living organisms is known as taxonomy. It has a rich history that dates back to ancient times. The first known attempts at classifying organisms were made by Aristotle, a Greek philosopher who lived around 300 BC. Aristotle classified organisms into groups based on their similarities and differences, essentially creating the very first categories of the natural world.

Throughout history, the methods and systems of taxonomy have evolved significantly. In the 18th century, Carl Linnaeus developed a binomial nomenclature system, which is still in use today. This system assigns each species a two-part Latin name, reflecting its genus and species, respectively, and organizes life into hierarchical categories such as kingdom, phylum, class, order, family, genus, and species. As science progressed, the discovery of DNA and the development of genetic analysis have further refined our understanding of the relationships between organisms, allowing taxonomy to be based on evolutionary ancestry rather than just physical characteristics.

The Multifaceted Uses of Organisms

Organisms play an essential role in the well-being and survival of humans. They are used in a multitude of ways that extend far beyond basic needs. For instance, plants are a primary source of food, medicines, and raw materials for various industries. Animals provide meat, dairy products, fibers like wool and silk, and have roles in labor and companionship.

Microorganisms, though they can't be seen with the naked eye, have vital uses in food production through fermentation processes, in the decomposition of waste, and even in biotechnological applications such as genetic engineering and antibiotic production. The use of organisms has also propelled scientific research, giving rise to disciplines like biotechnology, ecology, and environmental science, which have led to advancements in sustainability and conservation efforts.

Fulfilling Basic Human Needs Through Natural Resources

The basic human needs of food, clothing, and shelter have been historically met through the use of natural resources, specifically organisms. For food, humans have depended on agriculture and the domestication of animals. Crops provide carbohydrates, proteins, and fats, while animals are a source of meat and dairy. Clothing has been sourced from materials like cotton, wool, and leather, which are all products of plants and animals. Shelter, historically, involved using timber for the construction of homes, animal skins for tents, and plant matter such as leaves and straw for roofing materials.

The process of meeting these needs has been a driving force for the development of early civilizations and continues to be a fundamental aspect of human life. Understanding how different organisms contribute to satisfying these needs is not only a part of biological classification but also a crucial component of economic and social development.