Class IX

Glottis is a
  1. gut
  2. tube
  3. cavity
  4. slit-like opening
Hindbrain is made up of
  1. Cerebrum
  2. pituitary gland
  3. Medulla Oblongata
  4. hypothalamus
Neurons
  1. make up nervous tissue
  2. differ in size
  3. differ in shapes
  4. all of these
To facilitate entry of CO2 in leaf is done through stomata as well as through water film on the
  1. upper epidermis
  2. lower epidermis
  3. spongy mesophyll cells
  4. spongy mesophyll cells
. Innermost layer of eyeball is
  1. iris
  2. retina
  3. retina
  4. pupil
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