· Earliest life, 3.9 billion years ago
· Early land plants 420 million years ago
· Largest mass extinction 248 million years ago
· Dinosaur extinction 65 million years ago
· "Lucy", early hominid, 4 million years ago
2. In the Archaean period, there are cyanobacteria and stromatites.
3. The three periods of time that are described as eras are the Paleozoic, the Mesozoic, and the Cenozoic.
4. There are five mass extinction events listed. They are:
End-Orcovician, where many types of ocean life became extinct including trilobites, brachiopods, and graptolites. The Late Devonian, stromatoporoids, brachiopods associated with reefs and more trilobites all became extinct, as coral systems… Continue Reading...
The key to measuring ecosystems is to use criteria that are consistent to determine when one ends and another begins.
Definition and causes of extinction
Extinction is the eradication of one of the three forms of biodiversity from the planet. When extinction occurs, that particular species, gene, or ecosystem no longer exists. Extinction is caused… Continue Reading...
of the species that inhabit these forests. The threats on their inhabitants are a direct danger of extinction to these woodlands, as what makes them thrive in the first place are their natural inhabitants. There is a need to increase the awareness level of the importance of trees in society. This paper explores different forests that exist in the world, with primary focus on one of the coastal forests and woodlands in different regions and continents.
The benefits of trees to our environment cannot be overemphasized. The ecosystem preservation depends mainly on the existence of trees and forests, and any society that truly cherishes the beauty of… Continue Reading...
susceptible to extinction and ongoing decline due to numerous local, regional, and international threats relating to human activities (Polidoro et al., p.1). As a result, numerous studies have been conducted on conservation of ocean or marine life. Existing studies focus on different aspects relating to this topic, particularly various approaches or strategies that can be utilized to protect ocean or marine life. These studies seek to identify evidence-based approaches that can help safeguard ocean/marine life and enhance human life.
Material and Methods
Since no practical aspects of research was conducted, existing studies… Continue Reading...
failure to adapt to such change can result in failure of the entity. In the contemporary, technological advancement has brought about major prospects for innovative organizations, but at the same time is facilitating the extinction of corporations that fail to adapt. Disruption in a particular market or industry is not a new phenomenon. However, in the present day, the pace, intricacy and worldwide nature of disruption is at a scale and magnitude that we have never perceived before. Furthermore, there is the expansion of technology to the extent that even small businesses are able to rival major corporations. Taking this into consideration, it is imperative for entities to evade organizational inertia and resistance to change.
Organizations, philosophies and power structures seem to become deep-rooted… Continue Reading...
Human conflicts with species have, in some quarters, been blamed for the extinction of some species in the past. This effectively means that human conflicts with species is one of the concerns that ought to be highlighted in the assessment of some of the potential reasons for the endangerment of Hawaiian monk seals. According to the authors, there have been numerous instances of intentional killing of Hawaiian monk seals by fishers on the main Hawaiian Islands. The article is of great relevance as it focuses on the human dimensions of endangered species, as opposed to the biological aspects of the same. In… Continue Reading...
extinction and greenhouse gases are all acceptable. However, when Lomborg asserts that “despite the intuition that something drastic needs to be done about such a costly problem [as carbon dioxide emissions], economic analyses clearly show that it will be far more expensive to cut carbon-dioxide emissions radically than to pay the costs of adaptation to the increased temperatures” (p. 5). This assumption is on the face of it rather weak because it is not based… Continue Reading...
to levels in which there is a distinct possibility of their extinction. People then must petition the requisite agencies and their leaders to get species placed on this list. The agency that oversees this list is the U.S. Fish and Wildlife Service. Specific roles people can petition include the Secretary of the Interior and the Secretary of Commerce.
Elephant Webcam Chart
12 p.m. The elephants were most active and moved a lot
2 p.m. The elephants were fed at this time of day.
4 p.m. The elephants were inactive and rarely moved
6 p.m. The elephants seemed to ignore the cleaning… Continue Reading...
way to protect the Native Americans from facing extinction (Wishart, 1995). Thousands of Cherokee perished from the cruel conditions of the long trek to the West. The Eastern Band of Cherokee, however, managed to avoid this fate: assisted by Thomas, hundreds of Cherokee were allowed to stay in Carolina thanks to the generosity of this legislator who donated his land to them. Likewise, those Cherokee who helped the federal government capture Tsali were also granted permission to stay.
In the second half of the 19th century, the Eastern Band Cherokee in North Carolina fought for the Confederates during… Continue Reading...
