The vitamin which is essential for blood clotting is
Vitamin- A
Vitamin- B
Vitamin- C
Vitamin- K
Polyp phase is absent in
Hydra
Aurelia
Physalia
Obelia
B.
Aurelia
Polyp and medusa are the asexual and sexual phases present respectively in coleoptiles.
Aurelia (jelly fish) belongs to Class- Scyphozoa, in which medusoid phase is dominant and polypoid phase is absent.
Hydra, Obelia, Physalia are the members of Class- Hydrozoa, in which, medusoid and polypoid both phases are present.
Metridium, Tubiporia etc are the members of Class- Anthozoa, with only polyps.
In frog heart, there are cardiac muscles which consists of fibres called
Purkinje fibres
myonemes
telodendria
columnae carnae
Malphigian tubules are
excretory organs of insects
excretory organs of frog
respiratory organs of insects
endocrine glands of insects
In blood, CO2 is transported majorly as
sodium carbonate
carboxyhaemoglobin
bicarbonate
CO2 as such