What evidence have you discovered that explains how embryology helps with understanding the evolutionary history of bats and birds?

for the points

feral cats are estimated to eat tens of millions of native animals each night in australia

these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.