Which best describes biogeographic isolation

a. it always leads to the formation of new species.

b. it cannot lead to evolution.

c. it is a mechanism for evolution.

d. it occurs only through geographic forces.

(options)

a chain link fence because there so tiny even my albino donkey can't get out

bradycardia ( blood presssure below 120/80mmhg )

it is contraindicated to give nitroglycerin to patients with blood pressure that is lower than normal range because the drug can cause blood pressure to drop further. it can lead to paradoxical bradycardia and less commonly, threatening hypotension.