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Basic Science Test 4

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Basic Science Test 4
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Recently ,a team of scientist have created world's first high definition 3D  model of a complete human brain .What is the name of this human brain?
  • Question 2
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    Which of the following is an example of Insectivorous plant _________.
    Solution
    Drosera, commonly known as the sundews, is one of the largest genera of carnivorous plants, with at least 194 species. These members of the family Droseraceae lure, capture, and digest insects using stalked mucilaginous glands covering their leaf surfaces.
  • Question 3
    1 / -0
    Which one of the following is the main cause of the ecological imbalance in India?
  • Question 4
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    Which one of the following is the correct sequence about various levels of organization of Biosphere?
    Solution
    The correct sequence is Organism - Population - Ecosystem -Biosphere. 
    Multiple organisms of same group or species living in a given area together form a population. 
    An ecosystem includes all of the living things such as plants, animals and organisms in a given area, interacting with each other, and also with their non-living environments. 
    The biosphere is one of the four layers that surround the Earth along with the lithosphere, hydrosphere and atmosphere and it is the sum of all the ecosystems.
  • Question 5
    1 / -0
    Who proposed the term Ecosystem ____________.
    Solution
    An ecosystem may be defined as a structural and functional unit of biosphere, comprising living organisms and their non-living environment that interact by means of food chains and chemical cycles resulting in the energy flow , biotic diversity and material cycling to form a stable, self-supporting system. The term ecosystem was introduced by Tansley in 1935. 
    E. P. Odum was an American biologist who brought the ecosystems ecology into the main stream and is also known as the father of modern ecology. He is known for his pioneering work on ecosystems ecology.
    Mobius was a German zoologist who was a pioneer in the field of ecology.
    Ernst Haeckel was a biologist and naturalist who is credited with the discovery, description and naming of thousands of species.
    Thus, the correct answer is option A. 
  • Question 6
    1 / -0
    Fahrenheit and Celsius are the two scales used for measuring temperature. If the numerical value of a temperature recorded in both the scales is found to be same, what is the temperature? 
    Solution
    Let T be the temperature.
    F= $$\dfrac{9}{5} C + 32$$
    put F=C=T
    T=-40
  • Question 7
    1 / -0
    Which one of the following statements is not correct?
    Solution
    Resistivity is an intensive property , it only depends on the nature of the material, temperature and nothing else
  • Question 8
    1 / -0
    Match List I with List II and select the correct answer using the code given below the Lists: 
    List I
    (Element)    		List II
    (Use)
    A. Li1. Time keeper in atomic clocks
    B. Na2. Batteries
    C. K3. Transfer of nerve impulses
    D. Cs4. Control of the water content in the blood
    Solution
    Lithium (Li) - Batteries
    Sodium(Na) - Control of the water content in the blood
    Potassium (K) - Transfer of nerve impulses
    Cesium (Cs) - Time keeper in atomic clocks
  • Question 9
    1 / -0
    With respect to the new initiative by the government regarding air pollution - AQI, choose the correct statement(s). 
    1. It aims to monitor the air quality of four metro cities only.
    2. It is a real-time measuring process.
    3. Dark red colour indicates the severe condition of air quality.
    Select the correct answer using the codes given below.
    Solution
    The AQI, as ‘One Number- One Colour-One Description’ for the common man to judge the air quality within his vicinity. There are six AQI categories, namely Good, Satisfactory, Moderately polluted, Poor, Very Poor, and Severe and colour will be from light green to dark red which is severe. The AQI will consider eight pollutants (PM10, PM2.5, NO2, SO2, CO, O3, NH3, and Pb) for which short-term (up to 24-hourly averaging period) National Ambient Air Quality Standards are prescribed. The PM launched the National Air Quality Index (AQI) for monitoring the quality of air in major urban centres across the country on a real-time basis and enhancing public awareness for taking mitigative action. As part of the endeavor, the Union Environment Ministry proposes to extend the measurement of air quality to 22 state capitals and 44 other cities with a population exceeding one million.
  • Question 10
    1 / -0
    Which component  is formed by plants in the ecosystem ________________.
    Solution
    The green plants initiate the ecosystem activity. They act as the producer organisms. They utilize sun's energy directly with the help of chlorophyll and synthesize organic compounds from simple inorganic substances such as water, carbon dioxide and minerals. 
    The animals act as the consumer organisms by utilizing the food produced by the green plants. They can be primary consumers which feed directly on plants, secondary consumers which feed on primary consumers or tertiary consumers which feed on secondary consumers. 
    Dead producers and consumers and their wastes sink to the bottom and form organic debris. Here, they are broken down by bacteria and fungi  to simple organic and inorganic substances. Thus, the bacteria and fungi form the decomposers which decompose the waste matter. 
    Thus, the correct answer is option C.
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