Based on cellular mechanisms there are two major types of regeneration found in the animals. Which one of the following is the correct example of the type mentioned?

• Morphallaxis - Regeneration of two transversely cut equal pieces of a Hydra into two small Hydras

• Epimorphosis - Replacement of old and dead erythrocytes by the new ones

• Morphallaxis - Healing up of a wound in the skin

• Epimorphosis - Regeneration of crushed and filtered out pieces of a Planaria into as many new Planarians

Which one of the following four secretions is correctly matched with its source, target and nature of action?

• Secretion	Source	Target	Action
  Gastrin	Stomach lining	Oxyntic cells	Production of HCl

• Inhibin

  Sertoli cells

  Hypothalamus

  Inhibition of secretion of gonadotropin releasing hormone

• Enterokinase

  Duodenum

  Gall bladder

  Release of bile juice

• Atrial Natiuretic Factor (ANF)

  Sinu atrial node (SAN) M- cells of Atria

  Juxta- glomerular apparatus (JGA)

  Inhibition of release of renin

3.

Which one of the following four glands is correctly matched with the accompanying description ?

• Thyroid - hyperactivity in young children causes cretinism

• Thymus - starts undergoing atrophy after puberty

• Parathyroid - secretes parathormone which promotes movement of calcium ions from blood into bones during calcification

• Pancreas - Delta cells of the Islets of Langerhans secrete a hormone which stimulates glycolysis in liver

Formation of non-functional methaemoglobin causes blue-baby syndrome. This is due to

• excess of arsenic concentration in drinking water

• excess of nitrates in drinking water

• deficiency of iron in food

• increased methane content in the atmosphere

Two of the body parts which do not appear in MRI may be

• molar teeth and eye lens

• scapula and canines

• ligaments and ribs

• tendons and premolars

Which one of the following statements is correct with respect to salt water balance inside the body of living organisms?

• when water is not available camels do not produce urine but store urea in tissues.

• Salmon fish excretes lot of stored salt through gill membrane when in fresh water

• Paramecium discharges concentrated salt solution by contractile vacuoles

• The body fluids of fresh water animals are generally hypotonic to surrounding water

The family containing mustard and its main characters are

• Brassicaceae - Tetramerous flowers, six stamens, bicarpellary gynoecium, siliqua type fruit

• Brassicaceae - Pentamerous flowers, many stamens, pentacarpellary gynoecium, capsule type fruit

• Solanaceae - Pentamerous flowers, five stamens, bicarpellary gynoecium, berry type fruit

• Poaceae - Trimerous flowers, three stamens, monocarpellary gynoecium, caryopsis type of fruit.

Which one of the following statements pertaining to plant structure is correct?

• Cork lacks stomata, but lenticels carry out transpiration.

• Passage cells help in transfer of food from cortex to phloem

• Sieve tube elements possess cytoplasm but no nuclei.

• The shoot apical meristem has a quiescent centre

When synapsis is complete all along the chromosome, the cell is said to have entered a stage called

• zygotene

• pachytene

• diplotene

• diakinesis

Many cells function properly and divide mitotically even though they do not have

• plasma membrane

• cytoskeleton

• mitochondria

• plastids