The parasphenoid bone in frog forms :
base of cranium
floor of cranium
dorsal side of cranium
dorsolateral side of cranium
B.
floor of cranium
Parasphenoid bone is a flattened and inverted T-shaped bone which lies in the median line along the floor of cranium.
The peculiar pungent smell of cockroach is produced by the secretions of :
pheromones
flame cells
abdominal glands
cervical glands
Debove's membrane is a layer of :
muscular tissue
epithelial tissue
connective tissue
all of the above
Which of the following structure in Pheretima posthuma plays the role of the liver of vertebrates ?
Calciferous glands
Gland cells
Chloragogen cells
Cliteller cells
In a vertebrate which germ layer forms the skeleton muscles ?
Ectoderm
Endoderm
Mesoderm
Both 'a' and 'c'
The function of pineal body is to :
lighten the skin colours
control sexual behaviour
regulates the period of puberty
all of the above