In the female cockroach the anterior wall, roof and floor of genital pouch are formed respectively by the following abdominal sterna of
7th , 8th and 9th segments
8th , 7th and 9th segments
9th , 8th and 7th segments
8th , 9th and 7th segments
Pacinian corpuscles occur in the skin of certain parts of body in mammals. These are
type of glands
pain receptors
naked tactile receptors
encapsulated pressure receptors.
Study the following statements with reference to nervous system in Periplanata.
I. The brain is mainly a sensory and an endocrine centre.
II. All thoracic ganglia supply nerves to the parts of their respective segments only.
III. Sixth abdominal ganglion is the largest of all the abdominal ganglia.
IV. Frontal ganglion is connected to the ingluvial ganglion by a recurrent nerve.
From the above identify the correct statements
II and IV
II and III
I and III
I and IV