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
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
举一反三
- ecological niches and their resident species
- The ecological niche of a species refers to: A: Position of the organism in the food web B: Role in the community and all associated biotic and abiotic factors C: Mode of reproduction and food habits D: Behavior in relation to other species in the community
- 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
- The conclusion seems to be that we ______. A: could make use of more natural species B: don't cultivate the right kind of food C: produce more food than we need D: cultivate too many different species
- 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