【单选题】In which of the following groups is the discovery of new species not mentioned in the passage?
【单选题】In which of the flollowing groups is the discovery of new species not mentioned in the passage?
【单选题】In terms of species, which of the following biologist holds that species are immutable ?
D.
Theodosius Grygorovych Dobzhansky
【简答题】革兰氏阳性菌细胞壁的主要成分为______和______,而革兰氏阴性菌细胞壁的主要成分则是______、______、______和______。
【多选题】In most cases, the aim of genetic engineering is to introduce a new trait to the plant which does not occur naturally in the species, which include:
A.
resistance to certain pests, diseases, or environmental conditions
C.
resistance to chemical treatments (e.g. resistance to a herbicide)
D.
improving the nutrient profile of the crop
【判断题】企业的出纳可以兼任会计,进行账目登记工作。
【判断题】出纳员可以兼任稽核工作、债券债务账目的登记工作、会计档案的保管工作、收入、支出、费用账目的登记工作。( )