10. Consider the following statements:
    1) Frogs can breathe by means of lungs only when they are adults.
    2) Reptiles breath by means of lungs right from the birth.
    Which of the statements given above is/are correct?
    (a)  1 only
    (b)  2 only
    (c)  Beth 1 and 2
    (d)  Neither 1 nor 2
Ans: (c)
11. The corners of the cells of collenchyma tissue in plants are thickened due to the deposition of: [NDA 2004]
    (a) Lignin and Suberin
    (b) Suberin and Cutin
    (c) Cellulose and Pectin
    (d) Chitin and Lignin
Ans: (c)
12. Match the following: [IAS 1998].
    A. Malaria               1. Fungi
    B. Pollomyellties        2: Bacteria
    C. Tuberculosis          3. Virus
    D. Ringworm              4. Protozoan
         A         B         C         D
    (a)  4         3         2         1
    (b)  4         3         1         2
    (c)  3         4         1         2
    (d)  3         4         2         1
Ans: (a)
13. Alpha-keratin is a protein present in : [IAS1997]
    (a) blood
    (b) skin
    (c) wool
    (d) eggs
Ans: (c)
14. Consider the following statements:
    1) The spider is an insect.
    2) The spider has eight legs.
    3) The spider has no wings.
    Which of these statements is/are correct?
    (a)  1 and 3
    (b)  2 and 3
    (c)  2 only
    (d)  3 only
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