Excretion in cockroach takes place by
nephridium
parotid gland
coxal glands
malpighian tubules
D.
malpighian tubules
In cockroach, excretion is mainly performed by one or two pairs of malpighian tubules. One of this pair opens into the middle region of intestine and other pair of coxal glands are located in prosoma and opens at bases of fifth walking legs.
In a vertebrate which germ layer forms the skeleton muscles ?
Ectoderm
Endoderm
Mesoderm
Both 'a' and 'c'
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
The parasphenoid bone in frog forms :
base of cranium
floor of cranium
dorsal side of cranium
dorsolateral side of cranium
The function of pineal body is to :
lighten the skin colours
control sexual behaviour
regulates the period of puberty
all of the above
