1、2010届高考英语短文阅读天天练习题3Z第B二B教-育R资b源网 A Doyouknowthataturtlecanlay12eggsinoneminute?Alargeseaturtlelaysaround150eggsatatime.Shelaysalltheseeggsinjustafewminutes. Largeseaturtlesliveinthewarmseasoftheworld.Exceptforwhentheylaytheireggs,theyspendtheirwholelivesinthewate
7、ersareasslowasturtles. B DNAisasubstancethatmakesupgenes.Everythingalivehasgenes.Plantshavegenes.Animalshavegenes.Youhavegenes.Genesarethebasicunitsofheredity(遗传).Hereditymeansallthecharacteristicsyouinheritfromyourparents.Yougetyourgenesfromyourparents.Youinherith