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Biology Test - 5

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Biology Test - 5
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Weekly Quiz Competition
  • Question 1
    3 / -1

    Human beings belong to the category ________ because they have a jawline.

    Solution

    Humans belong to Phylum Chordata because of the presence of an embryonic notochord. Since this notochord gets replaced with a vertebral column in the fully developed humans, they belong to subphylum Vertebrata. Further, since they have a jawline, they belong to Division Gnathostomata. Mammalia is a class under Gnathostomata.

    Hence option C is the correct answer.

  • Question 2
    3 / -1

    Which of the following is a correct example of a species that wreaked havoc in an alien ecosystem?

    Solution

    Japanese Kudzu vine is an example of alien species invasion. The vine was introduced in the southeast United States, where it went on to grow unchecked. It soon covered all plants and blocked all sunlight available for the plants. This happened because the natural predator for the vine was absent in the new ecosystem and therefore, there was no means to keep a control on the growth of these vines.

    Hence option A is the correct answer.

  • Question 3
    3 / -1

    Which of the following animals is correctly matched with its particular taxonomic category?

    Solution

    The binomial name of tiger is Panthera tigris and hence, the species name is tigris. Dog belongs to Chordata, which is a phylum and not a class. Humans belong to order Primata and family Hominidae. Frog belongs to class Amphibia.

    Hence option A is the correct answer.

  • Question 4
    3 / -1

    Which of the following categories occupies the top-most position of the classification triangle?

    Solution

    The taxonomy triangle is an upright triangle which is divided into various levels, each of which represents a particular taxon. The taxa are arranged from bottom to top, in the order Kingdom (bottom-most), Phylum, Class, Order, Family, Genus, Species (top-most). The largest taxon thus occupies the bottom-most position, and the smallest taxon, the top-most.

    Hence option B is the correct answer.

  • Question 5
    3 / -1

    The number of wildlife sanctuaries set up in India at present is:

    Solution

    India currently has 448 Wildlife Sanctuaries. In addition, there are 90 National Parks and 14 Biosphere Reserves in India.

    Hence option A is the correct answer.

  • Question 6
    3 / -1

    Phycomycetes is a class of kingdom:

    Solution

    Phycomycetes is a class of kingdom Fungi.

    [Phycomycetes is an obsolete polyphyletic taxon for certain fungi with aseptate hyphae. It is used in the Engler system. The class Phycomycetes has been abolished and in its place exists Zygomycetes, Chytridiomycetes, Plasmodiophoromycetes, Hyphochytridiomycetes, Trichomycetes and Oomycetes.]

    Hence option B is the correct answer.

  • Question 7
    3 / -1

    The term "New Systematics” was introduced by-

    Solution

    The term "New Systematics” was coined by Julian Huxley in 1940. This classification takes into account the cytological, morphological, genetic, anatomical, paleontological and physiological characteristics of an organism.

    Hence option C is the correct answer.

  • Question 8
    3 / -1

    One of the most important functions of Botanical Gardens is that

    Solution

    A Botanical Garden serves as a repository of different species of plants. These gardens help in the preservation of species that face the threat of extinction. Some Botanical Gardens also have cryopreservation facilities wherein the seeds of certain species are stored for future use.

    Hence option C is the correct answer.

  • Question 9
    3 / -1

    In Gram staining of bacteria, the primary stain used is:

    Solution

    Primary stain used is crystal violet. Crystal violet stains all the cells blue/purple.

    Hence option C is the correct answer.

  • Question 10
    3 / -1

    The species listed in the Red List are:

    Solution

    The IUCN (International Union for Conservation of Nature and Natural resources) maintains a Red List, which contains a record of species, which have been categorised into nine groups based on how close they are to extinction. These include extinct, extinct in the wild, critically endangered, endangered, vulnerable, near threatened, least concern, data deficient and not evaluated. As the number of individuals of a particular species reduces, the closer the species would move towards the category of extinction.

    Hence option D is the correct answer.

  • Question 11
    3 / -1

    Most endangered species are victims of:

    Solution

    Habitat loss is a major cause for the extinction of species. Every species is adapted to survive in its own habitat. Once the habitat is destroyed, the species can no longer survive in an alien condition. This gradually results in extinction.

    Hence option A is the correct answer.

  • Question 12
    3 / -1

    Binomial nomenclature of plants was given by-

    Solution

    Carolus Linnaeus employed the binomial system of nomenclature in the first edition of his book 'Species Plantarum' in 1753. According to this, a plant name consists of two Latin words, the first of which is the generic name and the second is the specific epithet. Engler and Prantl are famous for their contributions in the field of plant taxonomy.

    Hence option C is the correct answer.

  • Question 13
    3 / -1

    The interior of a cow-dung pile kept for a few days is quite warm. This is mostly because

    Solution

    Cellulose present in the dung is a good insulator.

    Bacterial metabolism inside the dung releases heat.

    Undigested material releases heat due to oxidation by air.

    Dung is dark and absorbs a lot of heat.

    Hence option B is the correct answer.

  • Question 14
    3 / -1

    Which among the following organisms lacks a cell wall throughout its life?

    Solution

    Mycoplasma is a genus of bacteria that lack a cell wall around their cell membrane. Without a cell wall, they are unaffected by many common antibiotics such as penicillin or other beta-lactam antibiotics that target cell wall synthesis.

    Hence option C is the correct answer.

  • Question 15
    3 / -1

    Select the correct match from the following.

    Solution

    Symbiosis - association between two organisms where both get benefited. Lichens are symbiotic association between algae and fungi.

    Hence option D is the correct answer.

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