安裝中文字典英文字典辭典工具!
安裝中文字典英文字典辭典工具!
|
- How do you calculate the biodiversity of an ecosystem?
The are some indexes (such as Shannon Index, Simpson's Index) Ecologists developed some diversity indexes, which consider both the number and relative abundance of species within the community of concern, to express biodiversity Simpson's index (D) measures the probability that two individuals randomly selected from a sample will belong to the same category Another commonly used index, the
- What is biodiversity? How are humans affecting this? | Socratic
Varieties of organisms at a place 1 The biodiversity is a varieties of organisms in the world or in a particular habitat High level of natural biodiversity is considered as important and desirable 2 But human beings are depleting the biodiversity by over utilisation of natural resources The deforestation, imposing the development schemes without cosidering the future consequences etc
- What are the concerns of the environmental justice movement?
Developing countries vs developed countries dilemma In general polluters do not pay for their environmental damages For example China contaminates air This contamination passes the Pacific Ocean and affect California (USA) The second important point is Afro-Americans (in the USA) live near hazardous waste sites because the land close to such sites are cheaper Therefore it is clear that
- In which era did dinosaurs exist or begin to exist? Mammals?
Dinosaurs existed during the Mesozoic era Mammals existed at that time as well but flourished after dinosaurs went extinct This is a really cool site for this kind of thing
- Why were Native Americans forced to abandon their Iand and . . . - Socratic
American's unquenchable thirst for the land upon which Native Americans lived The first example of this happening was in George where the Cherokee were forced from their lands which became knows as "The Trail of Tears " That was in 1830 After the Civil War Americans started looking at Oklahoma to expand into The civil population wanted to settle on Native American lands, the government
- What causes mass extinctions? - Socratic
While multiple causes may result in mass extinctions, a major change in the earth's ecology, atmosphere, surface and water at rapid rates is a common cause in all the hypotheses There have been any theories about the causes of mass extinction but scientists have narrowed down several of the most likely causes of extinction as: - flood basalt events ( volcanic eruptions) - asteroid collisions
- What does the phylogenetic tree tell you about the . . . - Socratic
Phylogenetic tree reveals evolutionary relationships between different organisms, their common ancestor, and descendants Our knowledge on evolution of biodiversity could be illustrated easily by forming phylogenetic trees Root of the tree represents ancestral population from which other organisms evolved Nodes on the tree are branching points Each branching point represents a time in the
- Question #75aa6 - Socratic
Sulfur dioxide, or #SO_2#, will react with oxygen gas, or #O_2#, to form sulfur trioxide, or #SO_3#, according to the balanced chemical equation
|
|
|