【判断题】In species in which females are the homogametic sex, gender of offspring is determined by the male.
【单选题】In which of the following groups is the discovery of new species not mentioned in the passage?
【简答题】背书是指在票据背面或者粘单上记载有关事项并签章的票据行为。背书转让的票据,背书可以不连续。 ( )
【单选题】In terms of species, which of the following biologist holds that species are immutable ?
D.
Theodosius Grygorovych Dobzhansky
【简答题】背书是指在票据背面或者粘单上记载有关事项并签章的票据行为;以背书转让的票据背书可以不连续。( )
【简答题】细菌细胞壁特有的成分是什么?革兰阳性菌细胞壁特有成分是什么?革兰阴性菌细胞壁特有成分是什么?革兰阳性菌和革兰阴性菌的主要区别是什么?
【单选题】Species in which the sexes are separated into staminate and pistillate plants are _____________ .