Multiple Choice Questions

Advertisement

Water pollinated plants have

  • Bright colour

  • Fragrance

  • Nectar

  • Tassels

  • Tassels


E.

Mucilage covering over pollen grains

Water pollinated species have pollen grains are that protected from wetting by mucilaginous covering.


Advertisement

Choose the wrong statement regarding human blood and circulatory system

  • Persons with blood group AB can receive blood from any person with any blood group

  • Calcium ions play an important role in blood clotting

  • Angina is acute chest pain when enough oxygen does not reach the brain

  • In a myogenic heart the normal activities are regulated intrinsically

  • In a myogenic heart the normal activities are regulated intrinsically


The granulocytes which secretes histamine, serotonin and heparin are

  • Neutrophilss

  • Basophils

  • Eosinophils

  • Lymphocytes

  • Lymphocytes


The main function of the lacteals in the villi of human small intestine is to absorb 

  • Fat globules

  • Water and mineral salts

  • Amino acids

  • Glucose and amino acids

  • Glucose and amino acids


The central hollow portion of the human vertebra is called

  • Acromion

  • Centrum

  • Neural canal

  • Sternum

  • Sternum


Advertisement

Excretory structures in Rotifers are

  • Green glands

  • Malpighian tubules

  • Flame cells

  • Gills

  • Gills


In a cardiac cycle, if the stoke volume is 70 ml and heart rate is 72 beats/minute, then cardiac output is

  • 142 ml/minute

  • 72 ml/minute

  • 1070 ml/minute

  • 70 ml/minute

  • 70 ml/minute


The collagenous connective tissue layer holding the muscle bundles together is 

  • Pleura

  • Pericardium

  • Sarcolemma

  • Fascia

  • Fascia


This hormone reduces cellular glucose uptake and utilization

  • Glucagon

  • Insulin

  • Aldosterone

  • Thymosin

  • Thymosin


Advertisement

Many fresh water animals cannot live for long in sea water mainly because of the

  • Change in the atmosphere

  • Change in the levels of thermal tolerance

  • variations in light intensity

  • Osmotic problems they would face

  • Osmotic problems they would face