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Biological Classification Test - 20

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Biological Classification Test - 20
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  • Question 1
    1 / -0
    The scientist who created the group Protista for both unicellular plants and animals is:
    Solution
    Protista was first observed by John Hogg in 1860. This kingdom was known as Kingdom 'Protoctista' at that time and consisted of unicellular plants and animals. In 1866 Ernst Haeckel coined the term 'Protista' for them.
    Thus, the correct answer is option A.
  • Question 2
    1 / -0
    Cryptogams are:
    Solution

    In the plant kingdom, non-flowering plants or non-seed generating plants or spore-producing plants are named Cryptogams. Cryptogams are thallophytes, bryophytes and pteridophytes. They are found in aquatic and terrestrial areas. Thallophyta, Bryophyta, and Pteridophyta all reproduce via spore production.

    • So, the correct answer is option A.
  • Question 3
    1 / -0
    Organisms called methanogens are most abundant in a
    Solution
    Methanogens are the primitive bacteria belonging to archaea which are able to produce methane through the process of methanogenesis. These organisms can utilise the carbon dioxide and hydrogen gas to form methane. These organisms are found in marshy areas where they produce the marsh gas, in swamps and in the stomach of cattle. The methane is released along with the other wastes by the cattle and so, methane is found abundantly in the cattle yard. 
    Thus, the correct answer is option C. 
  • Question 4
    1 / -0
    Prokaryotes have:
    Solution
    Prokaryotes are the most primitive organisms on Earth. They do not have a proper nucleus. The genetic material is not enclosed within a nuclear membrane. The genetic materials lie in the cytoplasm to form a region called nucleoid (nucleus-like).
    Hence, the correct option is B.
  • Question 5
    1 / -0
    When a bacterium is provided with flagella arising from two opposite ends, it is called
    Solution
    The flagella is an elongated filament-like structure which allows the bacteria to move or show locomotion. There are different types of bacteria which are classified on the basis of the presence and number of flagella around the cell. When the flagella is present at both the opposite ends of the bacterium, they are known as amphitrichous. 
    Thus, the correct answer is option C. 

  • Question 6
    1 / -0
    Which of the following represents obligate anaerobes.
    Solution

    The term Obligate anaerobes represent such microorganisms which can survive only in the absence of oxygen, i.e. presence of oxygen in their surrounding environment acts as a poison for them. Methane bacteria also called as methanogens are methane-producing bacteria which are obligate anaerobes as their metabolic processes do not require oxygen. Spirogyra are the green algae which produces oxygen. Pisum Sativum is commonly known as Green pea, which is a vegetable. Onion is also a vegetable.

     

    The correct answer is D. 

  • Question 7
    1 / -0
    Which is not true for Paramecium?
    Solution
    Whenever the Paramecium gets in contact to the food its ciliary movement pulls the food and direct it towards the groove. The cilia in the groove then direct food inside through the gullet to the protoplasm in form of a food vacuole. Paramecium form cysts during unfavourable conditions and also contain contractile vacuole for osmoregulation.
    Thus, the correct answer is option (D).
  • Question 8
    1 / -0
    The scientist who coined the term 'protista' to include both plant and animal like unicellular organism was
    Solution
    Protista was first observed by John Hogg in 1860. This kingdom was known as Kingdom 'Protoctista' at that time and consist of unicellular plants and animals. In 1866 Ernst Haeckel coined the term 'Protista' for them.
  • Question 9
    1 / -0
    Planktons are organisms which
    Solution
    Plankton are members of kingdom Protista. They passively float on water surface and are called planktons. For example, Chrysophytes. 
    The free swimming animals are known as pelagic.
    Those that reside in the deep are known as benthic.
    The burrowing animals are known as fossorial animals such as rabbit.
    Thus, the correct answer is option (A).
  • Question 10
    1 / -0
    Phytoplankton consists of
    Solution
    Phytoplankton are small aquatic organisms and they provide food, energy and oxygen to aquatic animals by photosynthesis. These includes aquatic algae and photosynthetic bacteria. For example, Chrysophytes.
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