Ans: (b)
15. Consider the following worms:
    1) Filaria worm
    2) Guinea worm
    3) Hookworm
    4) Pinworm
    Which of the above worms are nematodes? [NDA 2004]
    (a)  1 and 2
    (b)  2, 3 and 4
    (c)  1, 3 and 4
    (d)  1, 2, 3 and 4
Ans: (d)
16. The improper function of which of the following results in condition "Myxedema" in human beings? [NDA 2004]
    (a) Adrenal gland
    (b) Pancreas
    (c) liver
    (d) Thyroid gland
Ans: (d)
17. The Hepatitis-B, which affects liver, is actually a : [NDA 2004]
    (a) Virus
    (b) Bacterium
    (c) Protozoan
    (d) Helminth
Ans: (a)
18. The short upper part of the human intestine next to the stomach is called: [CDS 2004]
    (a) Caecum
    (b) Duodenum
    (c) Ileum
    (d) Jejunum
Ans: (b)
19. Which one of the following is not a mammal? [CDS 2004]
    (a) Bat
    (b) Duck-billed platypus
    (c) Shark
    (d) Whale
Ans: (c)
20. Consider the following statements:
    1) Euglena is a procaryotic organism.
    2) Blue-green algae are eukaryotic organisms.
    Which of the statements given above is/are correct? [NDA 2004]
    (a)  1 only
    (b)  2 only
    (c)  Both 1 and 2
    (d)  Neither 1 nor 2