# 1pilihanshort day plant will flower when there is alow level of Pfrhigh level of Pfrmedium level of Pfrno Pfr
# 2pilihanhigh level of Pfr in long day plant will make the plantnot floweringdiefloweringlive longer
# 3pilihansimilarities between steroid and non-steroid hormone [can choose more than one]both act on specific target cellboth bind to specific receptorboth produce cAMPboth form hormone-receptor complex
# 4pilihanrole of myelin sheathblock impulse transmissionslow down the rate of impulse transmissionspeed up the rate of impulse transmissionadd more impulse