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16
The pituitary is regarded as the master gland because
  • A. it is locatd in the brain
  • B. its secretion are the most numerous
  • C. its secretion control other endocrine glands
  • D. it is the biggest endocrine gland
  • E. it controls the activities of the brain
View Answer & Discuss WAEC 1991
17
Growing radicles of seddlings are
  • A. negatively phototropic
  • B. positively phototropic
  • C. negatively geotropic
  • D. negatively hydrotropic
  • E. positively phototactic
View Answer & Discuss WAEC 1991
18
Over-secretion of thyroxin is likely to lead to
  • A. thinness in body
  • B. sluggishness
  • C. cretinism in infant
  • D. reduced metabolism
  • E. dwarfism
View Answer & Discuss (4) WAEC 1991
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19
If a germinating seed is attached horizontally on a revolving klinostat, what will be the effect of the seedling after three days? The
  • A. plumule will curve vertically upward while the radicle will curve towards the ground
  • B. plumule and radicle will not show any curvature
  • C. radicle will curve towards the ground while the plumule will not show any curvature
  • D. plumule will curve vertically upward while the radicle will not show any curvature
  • E. plumule and radicle will curve towards the ground
View Answer & Discuss (4) WAEC 1991
20
The human skin is regarded as a sense organ because it
  • A. separates the body from the outside world
  • B. protects the body from cold and heat
  • C. regulates the water content of the body
  • D. has an outer layer of dead cells
  • E. has nerve endings
View Answer & Discuss (1) WAEC 1991
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