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The Living World Test - 63

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The Living World Test - 63
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  • Question 1
    1 / -0
    Which taxonomic term may be suggested for any rank in the classification? 
    Solution
    Class, Order and Species are examples of taxonomic category or rank. Taxonomic rank shows the level of a taxon. Taxonomic ranks are useful for comparing two taxa ( plural of taxon ).
    The taxon is the term for any taxonomic category. It is used to denote any taxonomic unit. Taxon can be simply defined as the group of organisms occupying a particular category/rank. For example aves, mammalia are examples of taxon and 'class' is their taxonomic rank. Similarly, primata is an example of another taxon and 'order' denotes it's taxonomic rank.
    So, the correct option is 'Taxon'.
  • Question 2
    1 / -0
    The word species was coined by
    Solution
    The word species was coined by John Ray. It is the basic unit of classification. It contains species which can interbreed but are genetically distinct. 
    Thus, the correct answer is option C.
  • Question 3
    1 / -0
    Binomial nomenclature means that every organism has
    Solution
    Binomial nomenclature for the scientific naming of organisms was developed by Carolus Linnaeus. This system provides distinct and proper scientific names to the variety of organisms. Each name has two parts, i.e., the first part comprises of its generic name, while the second part is the specific epithet. This naming system which uses two word format is universally accepted and used, as it is more convenient to understand and follow. 
    For example, Mangifera indica Linn., here 'Mangifera' is genus while 'indica' is specific epithet, whereas Linn. represents that this species was first described by Linnaeus. Thus, the correct answer is option B.
  • Question 4
    1 / -0
    Which one of the following animals is correctly matched with its particular taxonomic category? 
    Solution
    The scientific name of tiger is Panthera tigris, where tigris is species name. Cuttlefish belongs to class Cephalopoda and phylum Mollusca. Humans belong to order Primates and Hominidae family. The scientific name of housefly is Musca domestica. Musca is genus name. It belongs to  Diptera order.
    Thus, the correct answer is option D.
  • Question 5
    1 / -0
    Two plants can be conclusively said to belong to the same species if they
    Solution
    Two plants can be conclusively said to belong to the same species if they can be reproduce freely with each other and form seeds. Species is a natural population of individuals or group of populations which resemble one another in all essential morphological (i.e., body form, size, shape, etc.) and reproductive characters so that they are able to interbreed freely and produce fertile offsprings.  A species can be easily distinguished from other closely related species on the basis of their distinct morphological differences
    So, the correct answer is 'Can reproduce freely with each other and form seeds'
  • Question 6
    1 / -0
    The system of giving one name to the individual is called
    Solution
    The system of giving one name to the individual is called uninomial system. This system was introduced with certain advantages for different purposes. The rules given by Linnaeus in the binomial system were considered quite complicated. To simplify the system and overcome these problems, Heywood suggested that two components of the name- generic name and specific epithet may be united together to form a single name. Thus the correct answer is option D. 
  • Question 7
    1 / -0
    Homo belongs to class 
    Solution
    • 'Homo' is the genus that comprises modern humans ( Homo sapiens ) and ancestors of humans that are extinct now.
    • 'Homo' genus is part of order 'Primata' ( primates ) and class 'Mammalia'.
    • Prosimii is a suborder of order 'Primata' and it includes primitive primates like lemur.
    • Anthropoidea is a suborder of order 'Primata'. It including monkeys, apes and humans.
    So, the correct option is 'Mammalia'.
  • Question 8
    1 / -0
    Sibling species can be distinguished on the basis of 
    Solution
    • Sibling species are those two or more related species that are nearly identical in external appearance but are incapable of producing fertile offspring.
    • The biological species concept defines a species as members of populations that actually or potentially interbreed in nature to produce fertile offspring, not according to similarity of appearance. So, this concept can be used to distinguish between sibling species.
    So, the correct answer is 'Biospecies concept'
  • Question 9
    1 / -0
    Which is not correct about species?
    Solution
    • According to biological species, concept members of a species are morphologically similar and can potentially interbreed with each other but are reproductively isolated with other species.
    • They usually occupy the same habitat as reproductive isolation results in the evolution of species adapting for a particular habitat.
    • Hence, statements given in options A, B and C are correct while the statement given in option D is incorrect.
    • So, the correct option is 'Members of a species cannot interbreed with members of other species.'
  • Question 10
    1 / -0
    Modern taxonomic studies do not deal with 

    (a) External structure 
    (b) Structure of cell 
    (c) Internal structure 
    (d) Phylogeny
    (e) Ontogeny
    (f) Nutrition 
    Solution
    Answer is option A.
    Modern taxonomic is Based on study of both external and internal structure of organism along with development process and cell structure of organisms.
    Ontogeny is the origination and development of an organism, usually from the time of fertilization of the egg to the organism's mature and in modern taxonomic ontogeny is important aspect.
    Phylogeny and nutrition were the old method of taxonomic studies which is not included in modern taxonomy methods.
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