Exam preparation MCQs with answers

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Why skeletal muscles are called striated muscles?
  • (A)  They appear darker than smooth muscles by naked eye.
  • (B)  Alternating dark and light bands appear on their surface when visualized by naked eye.
  • (C)  Alternating dark and light bands appear on their surface when visualized via a microscope.
  • (D)  All of these
Roots of a plant show______________?
  • (A)  Positive phototropism and negative geotropism
  • (B)  Negative phototropism and positive geotropism
  • (C)  Negative tactic movement and positive tropic movement
  • (D)  Positive geotropism of stem and roots
Ecdysone is_________________?
  • (A)  An enzyme that digest endocuticle during an arthropodal ecdysis
  • (B)  A newly formed exoskeleton in authropods
  • (C)  A hormone that regulates moulting in arthropods
  • (D)  A process that involves moulting