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GK Biology For SSC Exams Test 71
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GK Biology For SSC Exams Test 71
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  • Question 1/10
    1 / -0
    Scurvy is caused due to the deficiency of :
    Solutions
    Scurvy is a disease resulting from a deficiency of vitamin C. Scurvy often presents initially with fatigue, followed by formation of spots on the skin, spongy gums, and bleeding from the mucous membranes. Spots are most abundant on the thighs and legs, and a person may look pale, feels depressed, and be partially immobilized.
  • Question 2/10
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    Photosynthetic vesicle found in bacteria is called ________.
    Solutions
    • Photosynthetic vesicle found in bacteria is called a Chromatophore.
    • Chromatophores are pigment-containing and light-reflecting cells, found in bacteria and a wide range of animals including amphibians, fish, reptiles, crustaceans and cephalopods.
    • They contain bacteriochlorophyll pigments and carotenoids.
  • Question 3/10
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    Movement of cell against concentration gradient is called_____.
    Solutions

    • Active transport is the only transport method that can move species against their concentration gradient.

    • Diffusion is the net movement of molecules or atoms from a region of high concentration  to a region of low concentration.

    • Passive transport is a movement of ions and other atomic or molecular substances across cell membranes without need of energy input.

  • Question 4/10
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    ‘Darwin finches’ refers to a group of
    Solutions
    Darwin's finches (also known as the Galápagos finches) are a group of about fifteen species of passerine birds.
    More information related to this :
    (i) They are often classified as the subfamily Geospizinae or tribe Geospizini.
    (ii) They belong to the tanager family and are not closely related to the true finches.
    (iii) They were first collected by Charles Darwin on the Galápagos Islands during the second voyage of the Beagle. 

    Hence, option C is correct.
  • Question 5/10
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    To which group of blood an universal recipient belongs?
    Solutions

    • Blood group AB individuals have both A and B antigens on the surface of their RBCs, and their blood plasma do not contain any antibodies against either A or B antigen.

    • Therefore, an individual with type AB blood can receive blood from any group (with AB being preferable), but cannot donate blood to any group other than AB. They are known as universal recipients.

  • Question 6/10
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    Animals living in the tree trunks are known as_____.
    Solutions
    • Arboreal animals are creatures who spend the majority of their lives in trees. They eat, sleep and play in the tree canopy.
    • There are thousands of species that live in trees, including monkeys, koalas, possums, sloths, various rodents, parrots, chameleons, geckos, tree snakes and a variety of insects. Many animals have evolved special adaptations to aid their arboreal lifestyles
  • Question 7/10
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    Which of the following pairs has open type of circulatory system?
    Solutions
    Open type of circulatory system is found in Molluscs and Arthropods. Both Cockroach and Silverfish have open type of circulatory system. In this type of circulatory system, the blood flows through open spaces called lacunae and sinuses.
  • Question 8/10
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    Minamata disease was caused due to
    Solutions
    Minamata disease sometimes referred to as Chisso-Minamata disease, is a neurological syndrome caused by severe mercury poisoning. Symptoms include ataxia, numbness in the hands and feet, general muscle weakness, loss of peripheral vision, and damage to hearing and speech. In extreme cases, insanity, paralysis, coma, and death follow within weeks of the onset of symptoms. A congenital form of the disease can also affect fetuses in the womb.
  • Question 9/10
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    Nutrients are recycled in the atmosphere with the help of certain micro-organisms referred to as
    Solutions
    Decomposers are organisms that break down dead or decaying organisms, and in doing so they carry out the natural process of decomposition. Like herbivores and predators, decomposers are heterotrophic, meaning that they use organic substrates to get their energy, carbon and nutrients for growth and development.
  • Question 10/10
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    In the human digestive system, the process of digestion starts in  _________.
    Solutions
    • Digestion is the chemical breakdown of the large molecules of food into smaller molecules.
    • In buccal cavity the food is mixed with saliva & the process of digestion starts.
    • Saliva contains the enzyme amylase that breaks some starches down into maltose and dextrin
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