ICSE-X-Biology

Previous Year Paper year:2012

with Solutions - page 4
 
  • #2-b-i
    A membrane which allows the passage of molecules selectively.
    Ans : Selectively permeable membrane
  • #2-b-ii
    The suppressed allele of a gene.
    Ans : Recessive character
  • #2-b-iii
    Structure that carries visual stimuli from retina to the brain.
    Ans : Optic nerve
  • #2-b-iv
    WBCs squeeze through the walls of the capillaries into the tissue.
    Ans : Diapedesis
  • #2-b-ix
    Statistical study of human population.
    Ans : Demography
  • #2-b-v
    Protective coverings located round the human brain and spinal cord.
    Ans : Meninges
  • #2-b-vi
    Eye lens losing flexibility resulting in a kind of long sightedness in elderly people.
    Ans : Presbypopia
  • #2-b-vii
    Hormones which stimulate other endocrine glands to produce their specific hormones.
    Ans : Tropic Hormones
  • #2-b-viii
    The phase in the menstrual cycle in which the remnant of follicle in the ovary turns to Corpus luteum.
    Ans : Luteal phase
  • #2-b-x
    Artificially introducing weakened germs or germ substance into the body for developing resistance to a particular disease.
    Ans : Vaccination
  • #3-a [5]
    Given below is the diagram of a cell as seen under the microscope after having been placed in a solution:
     8
  • #3-a-i
    What is the technical term used for the state icondition of the cell given above ?
    Ans : Plasmolysed
  • #3-a-ii
    Give the technical term for the solution in which the ceil was placed.
    Ans : Hypertonic solution
  • #3-a-iii
    Name, the parts numbered 1 to 4.
    Ans : (1) Nucleus (2) Chloroplast (3) Vacuole (4) Hypertonic solution