What does species diversity refer to? A. The variety of genes within a species. B. The variety of species in an ecosystem. C. The variety of habitats. D. The variety of climates. 相关知识点: 试题来源: 解析 B。物种多样性是指一个生态系统中物种的丰富程度。选项 A 是遗传多样性;选项 C...
Species diversity isthe number of different species that are represented in a given community (a dataset). ... Taxonomic or phylogenetic diversity is the genetic relationship between different groups of species. Species evenness quantifies how equal the abundances of the species are. How do you m...
Testing the MacArthur-Wilson Theory: What Determines Species Diversity on Islands K Claire 被引量: 0发表: 2006年 Revisiting an Old Riddle: What Determines Genetic Diversity Levels within Species? 2012. Revisiting an old riddle: what determines genetic diversity levels within species? PLoS Biol. 10...
Species diversity is the number of different species in a given community or region and represents one of major forms of biological diversity at the species level. As a group of individuals that can interbreed with one another, species is the basic component of genetic diversity and ecosystem div...
What can be done to protect species diversity? A. Establish protected areas and use resources sustainably. B. Increase human population. C. Destroy more habitats. D. Pollute more. 相关知识点: 试题来源: 解析 A。中文解析:可以通过建立保护区和可持续地使用资源来保护物种多样性,选项 A 正确。B ...
D. Competition between species. 相关知识点: 试题来源: 解析 A。中文解析:物种多样性面临的主要威胁有栖息地破坏、污染和气候变化等,选项 A 正确。B 选项中的疾病和自然灾害不是主要威胁;C 选项缺乏食物、水和住所不是主要威胁;D 选项物种之间的竞争不是主要威胁。
61. What is the main idea of the third paragraph? A. There is high species diversity in parks. B. Species diversity can help people feel happy C. It is important to listen to birds sing. D. Keeping birds is good for people's health. 相关知识点: 试题来源: 解析 答案见上 反馈...
No definition seems to be without exception, however. There are species in which individuals look very different from one another, as well as "cryptic species" that appear identical but are genetically distinct. Hybridization is also common, leading to animals like the liger (a lion-t...
But exactly how these and other forces work together to shape diversity is largely a mystery.Elizabeth PennisiSciencePennisi, E. 2005. What determines species diversity? Science 309:90.Pennisi, E. 2005. What determines species diversity. - Science 309: 90-90....
Is there a trade-off between species diversity and genetic diversity in forest tree communities? The two most important components of biodiversity, species diversity and genetic diversity, have generally been treated as separate topics, although a coor... Wehenkel,Bergmann,Gregorius,... - 《Plant ...