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The Living World Test - 40

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The Living World Test - 40
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Weekly Quiz Competition
  • Question 1
    1 / -0
    The correct sequence of taxa in the animal kingdom is 
    Solution
    The sequence of taxa in the animal kingdom is: kingdom, phylum, class, order, family, genus and species.
    Therefore, the correct hierarchical arrangement of taxonomic categories in ascending order is:
    Species → Genus → Family → Order → Class → Phylum → Kingdom
    (i) Phylum:
    Phylum is second highest unit of classification after Kingdom. It includes one or more related classes of animals. In plants, instead of phylum, the term ‘division’ is used.
    (ii) Class:
    Class is a taxonomic group consisting of one or more related orders. For example, the class, Mammalia, includes many orders like Primata (Man), Carnivora (Lim, tiger) etc.
    (iii) Order:
    Order is a taxonomic group containing one or more families. For example, the order, carnivora, includes many families.
    (iv) Family:
    Family is a taxonomic group containing one or more related genera e.g., Family hominidae contains apes, monkeys and man. In plants, families are categorized on the basis of vegetative and reproductive features.
    (v) Genus:
    Genus is a taxonomic group including closely related species. For example, the genus, Solanum, includes many species such as nigrum, melongena, tuberosum, etc.
  • Question 2
    1 / -0
    The levels in classification are called as
    Solution
    The levels in classification are called as taxa. A taxon is a unit in classification which may represent any level of grouping of organisms based on certain easily observable common characteristics like in maize (species), roses (genus), grasses (family), conifers (order), dicots (class), seed plants (division), etc. The term was introduced for the first time by ICBN during 1956. 
    So, the correct answer is option B.
  • Question 3
    1 / -0
    In a hierarchial scheme of taxonomic classification, the grouping just below order is ________.
    Solution
    Within the living world, the biggest taxonomic rank is kingdom. The next higher rank within a kingdom is the phylum or division. It is customary to use the term phylum for major groups in the animal kingdom and the term division for major groups in the plant kingdom. The phylum or division is a broad grouping of more or less closely related organisms, sharing certain common characteristics. Each phylum or division has the next taxon called class. The members of each class exhibit certain distinguishing characters that are unique only to them. In the same way, using comparable criteria of similarities and relationships, each class can be divided into orders, each order into families, each family into genera and each genus into species. Species are normally the basic or fundamental unit of classification. A species is, therefore, the narrowest taxonomic category and kingdom is the broadest category in the Linnaean hierarchy.
    So, the correct answer is option A.

  • Question 4
    1 / -0
    lCBN stands for:
    Solution
    ICBN stands for International Code of Botanical Nomenclature.
    The Code is an internationally recognized authority, intended to encourage stability within botanical nomenclature. It provides a stable method of naming taxonomic groups, avoiding and rejecting the use of names that may cause error or ambiguity or throw science into confusion.
    Some features of ICBN: 
    - Purpose is to ensure a unique, stable scientific name for every taxon.
    - Provides rules for publication, validation, documentation and typification of names.
    - Allow assignment and changes in names without interfering with scientific freedom.
    - Commissions provide an administrative system to oversee and interpret rules, but not based on case law.
    Thus, the correct answer is option C.
  • Question 5
    1 / -0
    Which of these terms is used in the classification of species?
    Solution
    The various levels in classification are a kingdom, phylum, class, order, family, genus, species.
    (i) The phylum is second highest unit of classification after Kingdom. It includes one or more related classes of animals. In plants, instead of phylum, the term ‘division’ is used.
    (ii) The class is a taxonomic group consisting of one or more related orders. For example, the class, Mammalia, includes many orders like Primata (Man), Carnivora (Lim, tiger) etc.
    (iii) A family is a taxonomic group containing one or more related genera eg. Family hominidae contains apes, monkeys and man. In plants, families are categorized on the basis of vegetative and reproductive features.
    (iv) The order is a taxonomic group containing one or more families. For example, the order, Carnivora, includes many families.
    (v) Genus is a taxonomic group including closely related species. For example, the genus, Solanum, includes many species such as nigrum, melongena, tuberosum, etc.
  • Question 6
    1 / -0
    The branch of biology dealing with classification is known as
    Solution
    Taxonomy (biology), a branch of science that encompasses the description, identification, nomenclature, and classification of organisms.
    Physiology is the scientific study of normal function in living systems.
    Paleontology is the study of fossils.
    Mycology is the branch of biology concerned with the study of fungi.
    Therefore, the correct answer is option B.
  • Question 7
    1 / -0
    Which of the following correctly defines a species?
    Solution
    A species has often defined as a group of organisms where two hybrids are capable of reproducing fertile offspring, typically using sexual reproduction. It is the lowest category of taxonomic hierarchy and also the basic unit of classification.
    So, the correct answer is option D.
  • Question 8
    1 / -0
    Group of similar organisms which can breed among themselves are called a
  • Question 9
    1 / -0
    Classification is____________________________.
    Solution
    Classification is a sorting of all organisms into groups according to the similarities and dissimilarities between them or evolutionary background. The Scientific study of how living things are classified is called taxonomy. Thus, the correct answer is B.
  • Question 10
    1 / -0
    The highest unit of classification is 
    Solution
    • The modern classification is an extension of the system of classification proposed by Carolus Linnaeus.
    • The present system of classification involves a series of graded taxonomic ranks called taxa which include phylum and family in addition to the four taxa introduced by Linnaeus.
    • The hierarchy of taxonomic ranks is known as the Linnaean hierarchy. In this, any given taxon may contain several lower taxa that can be distinguished on the basis of common characteristics.
    • The biggest taxonomic rank is Kingdom. It is classified into Phyla, phyla into Classes, classes into Orders, order into Families, families into Genera and genera into Species.
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