How many days does is used for incubation of an egg to release chick? by Sunday | Sep 3 | Biology JAMB | 0 comments A. 21 B. 22 C. 20 D. 23 Correct Answer: Option A – 21 Users Also Read These:If the oestrus cycle of a goat is 27 days, how many…Which parts provides food for the developing chick?Hosea said that the children of Israel shall dwell…The half life of a radioactive substance is 14 days.…The incubation period of a chicken egg is?