Caterpillar is to butterfly as______. () A: tadpole is to frog B: worm is to bait C: nest is to chick D: salmon is to fish E: egg is to dinosaur

武汉市青山区吉林街小学钱艳玲老师讲授的Tadpole’s Mummy这节课的主要特点是_______________。

Early members of the class Reptilia were the first to produce( ). A: neotenic larvae B: amniotic eggs C: urea as a nitrogenous waste D: tadpole larvae E: isolecithal eggs