In a vertebrate which germ layer forms the skeleton muscles ?
Ectoderm
Endoderm
Mesoderm
Both 'a' and 'c'
C.
Mesoderm
In vertebrates skeletal muscles are mesodermal in origin.
Debove's membrane is a layer of :
muscular tissue
epithelial tissue
connective tissue
all of the above
The parasphenoid bone in frog forms :
base of cranium
floor of cranium
dorsal side of cranium
dorsolateral side of cranium
The peculiar pungent smell of cockroach is produced by the secretions of :
pheromones
flame cells
abdominal glands
cervical glands
Which of the following structure in Pheretima posthuma plays the role of the liver of vertebrates ?
Calciferous glands
Gland cells
Chloragogen cells
Cliteller cells
The function of pineal body is to :
lighten the skin colours
control sexual behaviour
regulates the period of puberty
all of the above