Diversity in the living world Questions in English

(A) According to the principles of binomial nomenclature,every living organism is assigned a unique scientific name globally. This name consists of two components: the genus name and the specific epithet. Therefore,each organism has only one valid scientific name recognized internationally to avoid confusion.

(D) The process of grouping organisms into convenient categories based on easily observable characters is known as $Classification$.
$Classification$ is the scientific procedure of arranging organisms into groups or sets on the basis of similarities and dissimilarities.
$Nomenclature$ refers to the naming of organisms, while $Identification$ refers to the process of determining the identity of an organism.
Therefore, the correct option is $D$.

(A) Scientific names for plants are based on the principles and criteria provided in the International Code for Botanical Nomenclature $(ICBN)$.
Similarly,scientific names for animals are based on the International Code of Zoological Nomenclature $(ICZN)$.
These codes ensure that each organism has a unique and universally accepted name.

(A) The binomial nomenclature system was developed by Carolus Linnaeus.
This system provides a distinct scientific name to each organism,consisting of two parts: the generic name (genus) and the specific epithet (species).
Linnaeus is often referred to as the 'Father of Taxonomy' for his significant contributions to the classification of living organisms.

(B) The binomial nomenclature system,which provides a distinct scientific name to every organism consisting of two components (genus and species),was proposed by $Carolus \ Linnaeus$. He is also known as the father of modern taxonomy.

(B) The term 'New Systematics' (also known as Biosystematics) was proposed by Sir Julian Huxley in $1940$.
It emphasizes the study of species based on all available characteristics,including morphological,physiological,genetic,and ecological data,rather than just morphological features.

(A) The $Sushruta Samhita$ is an ancient Sanskrit text on medicine and surgery. In the context of biological classification in ancient Indian literature, $Sushruta Samhita$ provides a systematic classification of living organisms into $Sthavara$ (immobile/plants) and $Jangama$ (mobile/animals). Therefore, it is considered a significant early reference to the classification of organisms.

(C) Julian Huxley is credited with introducing the term '$New \ Systematics$' (also known as $Biosystematics$).
This approach considers all characteristics of organisms,including their evolutionary history,genetics,and ecological relationships,rather than relying solely on morphological features.
Therefore,the correct option is $C$.

(A) The scientific naming of plants is governed by the $ICBN$ (International Code for Botanical Nomenclature).
$ICZN$ (International Code for Zoological Nomenclature) is used for naming animals.
$IUPAC$ (International Union of Pure and Applied Chemistry) is used for chemical nomenclature.
Therefore,the correct option is $A$.

(A) Binomial nomenclature is a formal system of naming organisms in which each organism is given a name consisting of two components: the generic name (genus) and the specific epithet (species). Therefore,the correct answer is $2$.

(B) According to the rules of biological nomenclature,scientific names are derived from Latin. To indicate this Latin origin,when scientific names are printed,they are written in 'Italics' style. If they are handwritten,both components are underlined separately.

(A) $ICBN$ stands for International Code for Botanical Nomenclature. It is the set of rules and recommendations that govern the formal scientific naming of plants,fungi,and certain other organisms.

(A) According to the rules of biological nomenclature,scientific names are generally derived from Latin or are Latinized,regardless of their origin. This is because Latin is a dead language and remains unchanged over time,ensuring stability in scientific naming. When handwritten,they are underlined,and when printed,they are written in italics to indicate their Latin origin.

(C) The scientific naming or nomenclature of living organisms is primarily based on the $Latin$ language.
This is because $Latin$ is a dead language,meaning it does not change over time,which provides stability to scientific names.
According to the rules of binomial nomenclature,scientific names are either derived from $Latin$ or are $Latinized$ to ensure universal consistency across the scientific community.

(A) The scientific name of maize (corn) is $Zea \ mays$.
Scientific names are binomial names assigned to organisms according to the rules of nomenclature.
$Zea$ represents the genus,and $mays$ represents the specific epithet.

(A) $ICBN$ stands for International Code for Botanical Nomenclature.
It is a set of rules and recommendations dealing with the formal botanical names that are given to plants,fungi,and some other organisms.
These rules ensure that each organism has a unique and universally accepted scientific name.

(D) species is defined as a group of organisms that can interbreed to produce fertile offspring.
Members of the same species share a common gene pool,and gene flow (the transfer of genetic material) occurs between populations of the same species through migration and interbreeding.
Therefore,the statement that 'gene flow is not observed among populations of the same species' is false.

(C) Phenetic classification,also known as numerical taxonomy,is based on the observable characteristics of organisms.
It involves the grouping of organisms based on their overall similarity,regardless of their evolutionary history or ancestry.
In this method,all observable traits are given equal weight,and mathematical methods are used to quantify the degree of similarity between different organisms.
Therefore,option $C$ is the correct answer.

(C) In the early stages of human civilization,classification was primarily based on the immediate needs of humans. Humans classified organisms based on their uses,such as food,shelter,and clothing. Therefore,the initial classification was based on the uses of organisms.

(D) The biosphere is the global ecosystem composed of living organisms (biota) and the non-living (abiotic) factors from which they derive energy and nutrients.
It encompasses a vast diversity of life forms,including microorganisms (bacteria,fungi,etc.),plants,and animals.
Therefore,all these groups are integral components of the biosphere.
Thus,the correct option is $(D)$.

(D) Living organisms exhibit a vast range of diversity in various aspects.
$1$. Shape and size: Organisms range from microscopic bacteria to massive blue whales.
$2$. Structure: There is immense variation in cellular organization,body plans,and anatomical features.
$3$. Lifestyle: Organisms occupy diverse habitats and exhibit different modes of nutrition,reproduction,and survival strategies.
Therefore,all these factors contribute to the biological diversity observed in nature.

(D) Classification is essential in biology for several reasons:
$1$. It helps in understanding the evolutionary relationships and interconnections between different groups of organisms.
$2$. It provides a systematic way to organize and gain knowledge about the vast biodiversity present on Earth.
$3$. It facilitates field studies by allowing researchers to identify and categorize organisms efficiently.
Therefore,all the given options are correct reasons for the necessity of classification.

(D) Living organisms exhibit immense diversity in various aspects.
$1$. Structure: Organisms vary in their morphological and anatomical organization,ranging from unicellular to complex multicellular forms.
$2$. Function: Physiological processes and metabolic activities differ across species to adapt to their environments.
$3$. Behavior: Organisms show diverse behavioral patterns,such as response to stimuli,social interactions,and survival strategies.
Therefore,diversity is observed in structure,function,and behavior.

(B) The study and identification of living organisms require a systematic approach.
Classification is the process by which anything is grouped into convenient categories based on some easily observable characters.
It allows us to organize the vast diversity of life into manageable groups,making it easier to study and identify organisms.
Therefore,classification is essential for the systematic study of living organisms.

(D) The biosphere consists of a vast array of living organisms,ranging from microscopic bacteria to massive blue whales.
Diversity in the biosphere is observed in multiple aspects:
$1$. Structure: Organisms vary in their cellular organization,body shape,and anatomical features.
$2$. Function: Organisms exhibit different physiological processes,metabolic pathways,and modes of nutrition.
$3$. Behavior: Organisms show diverse behavioral patterns,such as response to stimuli,social interactions,and reproductive strategies.
Therefore,all the given options are correct.

(B) Classification is the process by which anything is grouped into convenient categories based on some easily observable characters. It is essential for the identification and systematic study of the vast diversity of organisms present in the biosphere. Without classification,it would be impossible to study every single organism individually.

(D) Taxonomy is the branch of science that deals with the identification,nomenclature,and classification of organisms.
It is essential for:
$1$. Knowledge of bioresources: Understanding the diversity of organisms helps in identifying useful species for food,medicine,and industry.
$2$. Laboratory and field studies: Accurate identification is the foundation for any ecological or biological research conducted in labs or the field.
$3$. Forestry: Taxonomy helps in identifying tree species,understanding their growth patterns,and managing forest ecosystems effectively.
Therefore,all the given options are correct.

(C) Classification is the process by which anything is grouped into convenient categories based on some easily observable characters.
In biology,classification helps in identifying and organizing organisms found in different geographical regions.
By classifying organisms,we can document and catalog the plant life of a region,known as $Flora$,and the animal life of a region,known as $Fauna$.
Therefore,classification allows for the preparation of both $Flora$ and $Fauna$ records for various geographical areas.

(A) $ICBN$ stands for International Code of Botanical Nomenclature.
It is a set of rules and recommendations dealing with the formal botanical names given to plants.
The foundations of $ICBN$ were established in the book written by $C. Linnaeus$ named $Philosophia Botanica$.
It is independent of zoological nomenclature.
The rank of species is basic,and the relative order of the ranks of taxa is: species,genus,tribe,family,order,series,class,division,and kingdom.
The different ranks or categories have specific endings for their names,such as division (-phyta),class (-ae),and family (-aceae).

(A) The naming of plants is based on agreed principles and criteria,which are provided by the $ICBN$ (International Code for Botanical Nomenclature).
$ICZN$ (International Code for Zoological Nomenclature) provides the principles and criteria for the naming of animals.
Therefore,the correct option is $A$.

(A) Binomial nomenclature is a formal system of naming species of living things by giving each a name composed of two parts, both of which use Latin grammatical forms.
This system was proposed by Carolus Linnaeus in his book 'Species Plantarum' in $1753$.
Therefore, the correct answer is Linnaeus.

(C) $ICZN$ stands for $International$ $Code$ $of$ $Zoological$ $Nomenclature$. This organization is responsible for providing scientific names to animals. Similarly,$ICBN$ ($International$ $Code$ for $Botanical$ $Nomenclature$) is used for plants.

(B) The system of providing a name with two components is known as $Binomial$ $nomenclature$.
It was proposed by $Carolus$ $Linnaeus$.
In this system,each scientific name consists of two parts: the first is the $Generic$ $name$ (genus) and the second is the $Specific$ $epithet$ (species).

(A) Carl Linnaeus,the father of modern taxonomy,published his seminal work titled $Systema$ $Naturae$ in $1735$. This book laid the foundation for the binomial nomenclature system and the classification of organisms into hierarchical categories.

(A) The scientific name of wheat is $Triticum$ $aestivum$.
$Anacardiaceae$ is a family of plants (e.g.,mango).
$Musca$ $domestica$ is the scientific name of the housefly.
$Mangifera$ $indica$ is the scientific name of mango.

(C) $ICBN$ stands for International Code for Botanical Nomenclature. It is a set of rules and recommendations that govern the formal scientific naming of plants,fungi,and other organisms traditionally treated as plants.

(B) species is defined as a group of organisms that can interbreed under natural conditions to produce fertile offspring.
$1$. Members of a species can interbreed: This is true as it is the fundamental definition of a biological species.
$2$. Gene flow does not occur between the populations of a species: This is false. Gene flow is the transfer of genetic material from one population to another of the same species,which helps maintain the species' integrity.
$3$. Each species is reproductively isolated from every other species: This is true; reproductive isolation prevents interbreeding between different species.
$4$. Variations occur among members of a species: This is true; genetic variation is a characteristic feature of all populations within a species.

(B) $1$. $Musca$ $domestica$ is the scientific name of the housefly,not a lizard. Thus,option $A$ is incorrect.
$2$. $Plasmodium$ $falciparum$ is correctly named,printed in italics,and is a protozoan pathogen responsible for the most severe form of malaria (malignant malaria). Thus,option $B$ is correct.
$3$. $Panthera$ $tigris$ is the scientific name of the tiger,but it is not found in Gir forests (Gir is famous for Asiatic lions). Thus,option $C$ is incorrect.
$4$. $E.$ $coli$ stands for $Escherichia$ $coli$,not $Entamoeba$ $coli$. $Entamoeba$ is a genus of amoeboid protozoa. Thus,option $D$ is incorrect.

(D) Phylogenetic classification systems are based on the evolutionary relationships between the various organisms.
These systems assume that organisms belonging to the same taxa have a common ancestor.
Chemotaxonomy uses chemical constituents of plants,Cytotaxonomy uses cytological information like chromosome number,structure,and behavior,and Numerical taxonomy uses observable characteristics through computer-based analysis.
Therefore,the correct option is $D$.

(B) Pedology is defined as the scientific study of soil in its natural environment. It involves the study of soil formation (pedogenesis),soil morphology,and the classification of soils. Therefore,the correct option is $B$.

(D) species is defined as a group of organisms that can interbreed to produce fertile offspring.
$1$. Members of a species share a common gene pool,which means gene flow occurs between populations of the same species.
$2$. Variations naturally arise among members of a species due to mutations and recombination.
$3$. Reproductive isolation is a key characteristic that separates one species from another.
$4$. Therefore,the statement that 'there is no gene flow between populations of a species' is incorrect,as gene flow is a fundamental process that maintains the genetic integrity of a species.

(N/A) Diversity in the living world,also known as $Biodiversity$,refers to the vast variety of life forms present on Earth.
It encompasses the immense range of organisms,including bacteria,fungi,plants,and animals,that differ in their morphology,physiology,habitat,and genetic makeup.
Key aspects of diversity include:
$1$. $Species$ $Diversity$: The variety of different species in a given area.
$2$. $Genetic$ $Diversity$: The variation in genes within a species.
$3$. $Ecological$ $Diversity$: The variety of ecosystems,such as deserts,rainforests,and wetlands.
Currently,the number of species known and described ranges between $1.7-1.8$ million,which represents only a fraction of the total life forms existing on our planet.

(A) $1$. Identification: It is the process of correctly assigning an organism to a known taxonomic group by comparing its characteristics with already known organisms.
$2$. Nomenclature: It is the process of providing a standardized name to an organism so that it is known by the same name all over the world. The most widely accepted system is the Binomial Nomenclature,proposed by Carolus Linnaeus,which uses two components: the Generic name and the Specific epithet.

(N/A) $(i)$ $A$ scientific name is a standardized name given by biologists to an organism,ensuring that it is referred to by the same name in every part of the world,thus avoiding confusion caused by local names.
$(ii)$ Biodiversity refers to the vast variety of living organisms,including microbes,plants,and animals,that inhabit the biosphere. These organisms exhibit diversity in various aspects such as their size,shape,habitat,lifestyle,and physiological characteristics.

(N/A) Ask your teachers and parents to suggest the names of plants and animals and practice drawing them. You can also take help from your textbook to find the names of plants and animals.

(C) To solve the problem of varying local names,botanists have devised the system of $Binomial$ $Nomenclature$ so that a particular species can have a unique name for scientific study.
$ICBN$ ($International$ $Code$ for $Botanical$ $Nomenclature$) ensures that such a name has not been used for any other organism.
Each name has two components: the generic name and the specific epithet.
This system of naming was given by $Carolus$ $Linnaeus$.

(A) $(i)$ $ICBN$ stands for International Code for Botanical Nomenclature. Similarly,$ICZN$ stands for International Code for Zoological Nomenclature,which governs the naming of animals.
$(ii)$ $Carolus$ $Linnaeus$ is known as the father of taxonomy and proposed the Binomial Nomenclature system. New Systematics (or Biosystematics) was proposed by $Julian$ $Huxley$.

(N/A) $\rightarrow$ In order to facilitate the study,scientists have established procedures to assign a scientific name to each known organism.
$\rightarrow$ This is acceptable to biologists all over the world.
$\rightarrow$ For plants,scientific names are based on agreed principles and criteria,which are provided in the International Code for Botanical Nomenclature [$ICBN$].
$\rightarrow$ Animal taxonomists have evolved the International Code of Zoological Nomenclature [$ICZN$].
$\rightarrow$ The description of any organism should enable people in any part of the world to arrive at the same name.
$\rightarrow$ They also ensure that such a name has not been used for any other known organism.

$\rightarrow$ Binomial nomenclature was developed by Carolus Linnaeus in $1751$.
$\rightarrow$ Binomial nomenclature is the system of providing distinct and appropriate names to organisms,each consisting of two words: the first is the generic name (i.e.,name of the genus) and the second is the specific epithet (i.e.,name of the species).
$\rightarrow$ For example,the scientific name of Mango is written as $Mangifera \ indica$.
$\rightarrow$ In this name,$Mangifera$ represents the genus and $indica$ is the specific epithet.
$\rightarrow$ Advantages of Binomial Nomenclature:
$(1)$ Binomial names are universally acceptable and recognized.
$(2)$ They remain the same in all languages.
$(3)$ The names are short and precise.
$(4)$ It provides a mechanism to assign a scientific name to every newly discovered organism.
$(5)$ The names indicate the relationship of a species with other species present in the same genus.
$(6)$ $A$ new organism can be easily provided with a unique scientific name.

(A-D) The scientific names for the given animals are as follows:
$(A)$ Tiger: $Panthera tigris$
$(B)$ Peacock: $Pavo cristatus$
$(C)$ Housefly: $Musca domestica$
Scientific nomenclature follows the binomial system where the first word represents the genus and the second word represents the species.