The function of pineal body is to :
lighten the skin colours
control sexual behaviour
regulates the period of puberty
all of the above
D.
all of the above
The pineal body (gland) is small mass of tissues near the centre of the mammalian brain. It secretes the hormone melatonin. It contains light sensitive cells or has nervous connections from the eyes and melatonin regulates function related to light. It also regulates sexiial behaviour and regulating the period of puberty.
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 peculiar pungent smell of cockroach is produced by the secretions of :
pheromones
flame cells
abdominal glands
cervical glands
In a vertebrate which germ layer forms the skeleton muscles ?
Ectoderm
Endoderm
Mesoderm
Both 'a' and 'c'
