Biology Mock Paper - Disease and Lamarckism Questions
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Questions and Answers

What does the Pyramid of biomass depict in a food chain?

  • The total amount of living material (correct)
  • The different feeding levels
  • The number of organisms in each trophic level
  • The flow of energy through the food chain
  • In which ecosystems are an inverted pyramid of numbers and an inverted pyramid of biomass respectively seen?

  • Tree and sea ecosystems
  • Sea and tree ecosystems (correct)
  • Sea and grassland ecosystems
  • Grassland and tree ecosystems
  • Which organization released the list of endangered species?

  • WCC
  • BBC
  • UN
  • IUCN (correct)
  • What characterizes Amensalism in species association?

    <p>One species is harmed and the other is unaffected</p> Signup and view all the answers

    Where does Strontium-90 accumulate in the body?

    <p>Bone</p> Signup and view all the answers

    Which activity does not contribute to the loss of biodiversity?

    <p>Keeping animals in zoological parks</p> Signup and view all the answers

    Which plant is correctly matched with its scientific name?

    <p>Water lily - Rosa multiflora</p> Signup and view all the answers

    In a random mating population in equilibrium, which factor leads to a non-directional change in gene frequency?

    <p>Random drift</p> Signup and view all the answers

    Where is the antigen binding site located in each immunoglobulin?

    <p>Variable region of both heavy and light chain</p> Signup and view all the answers

    Who was awarded the Nobel Prize for the development of the PCR technique?

    <p>Kary Mullis</p> Signup and view all the answers

    From which organisms are insect control proteins extracted?

    <p>Bacillus thuringiensis</p> Signup and view all the answers

    Plants adapted to living partly in water and partly above the substratum are called:

    <p>Helophytes</p> Signup and view all the answers

    What is the main cause of chromosomal disorders?

    <p>Failure of segregation of chromatids during cell division</p> Signup and view all the answers

    What is the term for the gain or loss of a chromosome(s) due to failed segregation during cell division?

    <p>Aneuploidy</p> Signup and view all the answers

    What is the term for an increase in a whole set of chromosomes in an organism?

    <p>Polyploidy</p> Signup and view all the answers

    In a normal human being, how many pairs of autosomes are present?

    <p>23 pairs</p> Signup and view all the answers

    Which chromosomal disorder is characterized by the presence of an additional copy of a chromosome in an individual?

    <p>Trisomy</p> Signup and view all the answers

    What are examples of chromosomal disorders mentioned in the passage?

    <p>Down's syndrome and Turner's syndrome</p> Signup and view all the answers

    What is the main reason why offspring formed by sexual reproduction exhibit more variation than those formed by asexual reproduction?

    <p>Gametes of parents have qualitatively different genetic composition.</p> Signup and view all the answers

    When pollen is transferred from the anther of a flower to the stigma of another flower of the same plant, what type of pollination is it referred to as?

    <p>Geitonogamy</p> Signup and view all the answers

    Which organism is commonly used as an indicator of water pollution?

    <p>Escherichia coli</p> Signup and view all the answers

    In sexual reproduction, what contributes to the high variation in offspring?

    <p>The involvement of genetic material from different species.</p> Signup and view all the answers

    Which term describes the transfer of pollen between flowers of different plants?

    <p>Xenogamy</p> Signup and view all the answers

    Which of the following is not typically used as an indicator organism for water pollution?

    <p>Eichhornia crassipes</p> Signup and view all the answers

    What term describes the stage of disease known for the process of cell division?

    <p>Mitosis</p> Signup and view all the answers

    According to Lamarckism, why did long-necked giraffes evolve?

    <p>By stretching of necks over several generations</p> Signup and view all the answers

    Which components are correctly associated with mammalian testes?

    <p>Sertoli cells, Seminiferous tubules, Leydig cells</p> Signup and view all the answers

    In the given diagram of a young anther's transverse section, which labeling represents the correct placement of the wall layers?

    <p>(i) Epidermis Tapetum Endothecium Middle layers</p> Signup and view all the answers

    Which statement is most appropriate regarding leguminous plants and nitrogen deficiency?

    <p>Statement I is correct and Statement II is incorrect.</p> Signup and view all the answers

    Which of the following terms describes the spread of disease to other parts of the body?

    <p>Metastasis</p> Signup and view all the answers

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