The representative strain that can represent the typical characteristics of a strain is called ( ). A: Model species B: Typical species C: Representative species D: Reference species

How many_______known altogether A: species of fishes are B: species of fish is C: specieses of fish are D: species of fish are

在采用FactSage®热力学软件绘制三元相图过程中，关于产物数据的选择正确的是。（ ） A: 不用选择Compound species和Solution species B: Compound species和Solution species都选 C: 仅选用Compound species数据即可 D: 仅选用Solution species数据即可

What is synonym ? A: A name is shared by two or more species of plants B: A name is for a species of plants only C: A species of plants has two or more different names D: A species of plants has one Latin name only

这个物种处于不利地位。 A: This species is at a disadvantageous position. B: The species is at a disadvantage.

The amino acid sequence of cytochrome c is used to reveal the organisms that are most closely related. Which of the following organisms are most closely related? A: Species R and S B: Species S and T C: Species T and W D: Species S and W

这个物种处于不利地位。 A: This species is at a disadvantage. B: This species is at a disadvantageous position. C: / D: /

In the current national standard of Hongmu, the range of mahogany listed includes: A: 33 species, 8 classes, 5 genera. B: 29 species, 7 classes, 5 genera. C: 29 species, 8 classes, 5 genera. D: 29 species, 9 classes, 5 genera.

Invasive species are defined as A: a species not native to an area that spreads and causes damage to the area B: species suited to stable environments that produce a few, relatively large offspring and provide parental care C: species suited to changing environments that produce many offspring and provide little or no parental care D: species whose presence is key to maintaining biodiversity in an ecosystem and to upholding an ecological community’s structure

ecological niches and their resident species