Fruit and leaf drop at early stages can be prevented by the application of Option 1 : CytokininsOption 2 : Gibberellic acidOption 3 : AuxinsOption 4 : Ethylene

Out of ‘X’ pairs of ribs in humans only ‘Y’ pairs are true ribs. Select the option that correctly represents values of X and Y and provides their explanation: Option 1 : X = 24, Y = 12             True ribs are dorsally attached to vertebral column but are free on ventral side. Option 2 : X ...

GnRH, a hypothalamic hormone, needed in reproduction, acts on Option 1 : Posterior pituitary gland and stimulates secretion of oxytocin and FSH.Option 2 : Posterior pituitary gland and stimulates secretion of LH and relaxin.Option 3 : Anterior pituitary gland and stimulates secretion of LH and ...

Thalassemia and sickle cell anaemia are caused due to a problem in globin molecule synthesis. Select the correct statement. Option 1 : Thalassemia is due to less synthesis of globin molecules.Option 2 : Both are due to a quantitative defect in globin chain synthesis.Option 3 : Sickle cell ...

The presence of plants arranged into well-defined vertical layers depending on their height can be seen best in Option 1 : Tropical savannahOption 2 : Tropical rain forestOption 3 : Temperate forestOption 4 : Grassland

Good vision depends on adequate intake of carotene rich food. Select the best option from the following statements. (a) Vitamin A derivatives are formed from carotene. (b) The photopigments are embedded in the membrane discs of the inner segment. (c) Retinal is a derivative of Vitamin A. ...

A baby boy aged two years is admitted to play school and passes through a dental check-up. The dentist observed that the boy had twenty teeth. Which teeth were absent? Option 1 : CaninesOption 2 : Pre-molarsOption 3 : MolarsOption 4 : Incisors

Which cells of ‘Crypts of Lieberkuhn’ secrete antibacterial lysozyme? Option 1 : Zymogen cellsOption 2 : Kupffer cellsOption 3 : Paneth cellsOption 4 : Argentaffin cells

Root hairs develop from the region of Option 1 : Meristematic activityOption 2 : ElongationOption 3 : Root capOption 4 : Maturation

A decrease in blood pressure/volume will not cause the release of Option 1 : ADHOption 2 : AldosteroneOption 3 : Atrial natriuretic factorOption 4 : Renin

Which one of the following is related to ex situ conservation of threatened animals and plants? Option 1 : Amazon rainforestOption 2 : Wildlife safari parksOption 3 : Biodiversity hot spotsOption 4 : Himalayan region

Mycorrhizae are the example of Option 1 : MutualismOption 2 : AmensalismOption 3 : FungistasisOption 4 : Antibiosis