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.
Which of the following structure in Pheretima posthuma plays the role of the liver of vertebrates ?
Calciferous glands
Gland cells
Chloragogen cells
Cliteller cells
Glomerular filtrate is
blood minus blood corpuscles and plasma protein
blood minus corpuscles
mixture of water, ammonia and corpuscles
urine
A condition in which body's internal environment remains relatively constant within limits is called :
homeostasis
hemostasis
hematoma
haemopoiesis
Which of the following is not found in Hydra ?
Epithelio-muscular cells
Cnidocyte
Choanocyte
Nerve cells