Multiple Choice Questions

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Which of the following cytoplasmic granules contain histamine

  • Basophils

  • Acidophils

  • Eosinophils

  • Neutrophils


A.

Basophils

Basophils appear in many specific kinds of inflammatory reactions, particularly those that cause allergic symptoms.Basophils contain anticoagulant heparin, which prevents blood from clotting too quickly. They also contain the vasodilator histamine, which promotes blood flow to tissues.


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Refractory period of a muscle fibre in mammals is

  • 0.8001 sec

  • 0.002 sec

  • 0.004 sec

  • 0.005 sec


A branch of science in which. forest crop can be grown in desired pattern is

  • Histology

  • Horticulture

  • Pisiculture

  • siliviculture


Squeezing of leucocytes out from the endothelium of capillaries to fight foreign agents. is known as

  • haemolysis

  • diapaedesis

  • phagocytosis

  • rouleaux


When the pollen tube enters through the micropyle, it is termed as

  • chalazogamy

  • mesogamy

  • porogamy

  • none of these


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Which of the following factor is biotic

  • Photoperiod

  • CO2 content to the soil

  • Texture and porosity of soil

  • Rainfall


Which organ is considered as "Graveyard of RBC" where most of them are destroyed by macrophages

  • Red bone marrow

  • Spleen

  • Kidney

  • Intestine


When one organism is benefited without affecting the other, it is called

  • parasitism

  • commensalism

  • saprophytis

  • symbiosis


For self pollination, flower must be

  • unisexual

  • bisexual

  • monosexual

  • asexual


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Dispersal of fruits in Opium (poppy) occur through shaking by wind by

  • explosive mechanism

  • parachute mechanism

  • censer mechanism

  • jacular mechanism