After reading the above information, one reason different members of crow populations have a different rate of survival is there is always a chance that that some other variation will also effect some of the crows ability to survive. Another reason is that the vision, muscle strength and size can influence survival.
I believe the answer is anaerobic respiration. Sorry if that’s wrong though! :)
Answer:
#1 false its difficult but also possible. #2 true and #3 False. the Salivary gland in the mouth make 1.5 liters a day
A:True. B:True. hope this helps