Which of the following is not found in Hydra ?
Epithelio-muscular cells
Cnidocyte
Choanocyte
Nerve cells
C.
Choanocyte
Coanocytes are the characteristic cells of sponges not coelenterates.
In Hydra, epitheliomuscular cells, cnidoblasts, interstitial cells, nerve cells, sensory cells, epithelio musculonutritive cells are found.
A condition in which body's internal environment remains relatively constant within limits is called :
homeostasis
hemostasis
hematoma
haemopoiesis
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
The parasphenoid bone in frog forms :
base of cranium
floor of cranium
dorsal side of cranium
dorsolateral side of cranium