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The Living World Test - 42

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The Living World Test - 42
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Which is not true for species?
    Solution
    Gene flow within a population can introduce or reintroduce gene versions to a population, increasing the genetic variation of that population. Gene flow across populations can make distant populations genetically similar to one another, hence reducing the chance of speciation. The less gene flow between two populations, the more likely that two populations will evolve into two species.
  • Question 2
    1 / -0
    Hierarchical level below the category of family is
    Solution

    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 is 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.
    Therefore, the correct answer is option C.
  • Question 3
    1 / -0
    Organisms which can freely interbreed and produce fertile offspring and have similarly coded information or blueprint for making these organisms belong to the same
    Solution
    Organisms which can freely interbreed and produce fertile offspring and have similar coded information or blueprint for making these organisms belong to the same species. In biology, a species is one of the basic units of biological classification and a taxonomic rank. It is often defined as a group of individuals that actually or potentially interbreed in nature.
    So, the correct answer is option A.
  • Question 4
    1 / -0
    A group of interbreeding organisms is referred to be belonging to the same
    Solution
    Species are the fundamental biological unit of classification. John Ray, an English naturalist coined the term species.
    A species is a biological unit. They possess distinct morphological characters. They interbreed among themselves. They are reproductively isolated from other species. They have a common gene pool. There is a free flow of genes among themselves and each species has the capacity to give rise to new species.
    Therefore, the correct answer is option A.
  • Question 5
    1 / -0
    The largest herbarium in the world is located at
    Solution
    Royal Botanical Garden at Kew in England is the largest herbarium in the world. It is a World Heritage Site and houses extensive botanic collections of 7,000,000 specimens. Its aim is to increase knowledge and understanding of these specimens in order to conserve the diversity of plants and fungi for future generations. Thus the correct answer is option D.
  • Question 6
    1 / -0
    The niche of a species is meant for
    Solution
    • Niche means the function and the position of a species within an ecological community. In ecology a niche is the fitness of a species living under specific environmental conditions to the other closely related species within the same broad taxonomic class. 
    • Ecological niche models have a wide range of biological applications, particularly in conservation. 
    • A species niche includes all of its interactions with the biotic and abiotic factors of its environment.
    So the correct option is 'The habitat and specific function of species'.
  • Question 7
    1 / -0
    The basic unit of taxonomy is ____.
    Solution
    • Each unit or category of classification is termed as a taxon. It represents a rank. 
    •  Swedish botanist Carl Linnaeus is regarded as the Father of taxonomy,  as he developed a system known as Linnaean taxonomy for categorization of organisms and binomial nomenclature for naming organisms.
    • The term taxonomy was originally coined by Augustin Pyramus de Candolle in 1813. Linneaus is 'The Father of Plant Taxonomy'.
    • The basic unit or smallest taxon is the species. In biology, a species is the basic unit of classification and a taxonomic rank, as well as unit of biodiversity.
     So, the correct option is Species.
  • Question 8
    1 / -0
    The word species was coined by
    Solution
    The English naturalist John Ray (1627-1705) was an early botanical and zoological systematist who divided plants into monocotyledons and dicotyledons. He defined species as the largest group of organisms in which two individuals are capable of reproducing fertile offspring, typically using sexual reproduction.
    So, the correct answer is option A.
  • Question 9
    1 / -0
    The correct sequence of taxonomic categories is
    Solution
    Answer: (B) Division-Class-Order-Family-Genus-Species.
    Explanation: 
    • The most important step to determine the taxonomic position of an organism is to place the organism into existing ranks or form a new rank.
    • In taxonomy there are seven main ranks: 
                  1. Kingdom
                  2. Division(For plants)/Phylum(For animals)
                  3. Class
                  4.Order
                  5. Family
                  6.Genus
                  7. Species
    Hence the correct sequence of taxonomic categories is option (B).

  • Question 10
    1 / -0
    Sir Julian Huxley (1940) proposed the term
    Solution
    • The term 'New systematics', proposed by Sir Julian Huxley and he is considered as Father of new systematics. 
    • Charles Darwin explained the Natural selection. 
    • The term phylogeny is coined by Ernst Haeckel
    • The term taxonomy originally coined by Augustin Pyramus de Candolle 
    • So, the correct option is 'New systematic'. 
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