Class X

Heart of an amphibian has three chambers i.e.
  1. 2 ventricles and 1 auricle
  2. 2 auricles and 1 ventricle
  3. 3 ventriles and no auricle
  4. 3 auricles and no ventricle
When an impulse reaches a synaptic knob, synaptic vesicles fuse with the
  1. Pre-synaptic membrane
  2. Post-synaptic membrane
  3. Synaptic cleft
  4. Neurotransmitters
An internal factor that influences growth in plants is
  1. Hormones
  2. Water
  3. Nutrition
  4. All of above
 Embryo of Taenia is inside egg and contain chitinous hook that are in number
  1. 6
  2. 7
  3. 5
  4. 9
Production of leaves and flowers is due to
  1. Lateral meristems
  2. Intercalary meristems
  3. Apical meristems
  4. Cortex
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