Biology MCQs

Page No. 33

Which of the following is a uni-nucleated cell?


aA smooth muscle cell


bA cardiac muscle cell


cA skeletal muscle cell


dAll of these


View Answer A smooth muscle cell

The place of attachment of leaf with the shoot is called__________?


aPith


bPit


cPulvinus


dEcdysone


View Answer Pulvinus

Bony callus formation completes in___________?


a2-3 weeks


b3-4 weeks.


c2-3 months.


d3-4 months.


View Answer 2-3 months.

Which of the following cells are involved in soft callus formation?


aFibroblast and osteoblast.


bOsteoblast and osteoclast.


cOsteoclast and osteocyte


dOnteocyte and osteoblast



Sperms of liverworts, mosses, ferns move towards archegonia, in response to uncleic acid released by the ovum. This is an example of ____________?


aChemotropic movement


bChemotactic movement


cChemosastic movement


dHaptonastic movement


View Answer Chemotactic movement

A fracture hematoma has____________?


aHealing properties.


bDestructive properties.


cNeutralizing properties.


dDead cells


View Answer Dead cells

Vascular Cambium initially appears as actively dividing cells between_________________?


aPrimary Xylem and secondary xylem.


bPrimary xylem and secondary phloem.


cPrimary xylem and primary phloem


dSecondary xylem and secondary phloem.



If two ends of fractured bone are opened and kept united via screws and wires drilled in bone substance. This step in fracture repair is called___________?


aOpen reduction.


bClosed Fixation.


cOpen fixation.


dImmobilization


View Answer Open reduction.

Which of the following statements about fractures in old age is incorrect?


aThey are more common than in adult age.


bOccur as a result of bone being thin and weak.


cDue to good blood supply it results in quick healing.


dIt involves osteoblasts and osteocytes.



An increrase in plant girth due to activity of _____________ is called secondary growth?


aCork cambium


bPith


cVascular cambium


dBoth a and c


View Answer Both a and c

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