The heating and cooling of the earth, changes in sea level, asteroids, acid rain and diseases can all be natural factors that cause a species to become extinct. Humans can also be the cause of extinction for certain species.Know More
When a species cannot adapt to changing conditions, such as changing temperatures, they will not be able to survive. This inability to survive will hinder the repopulation of their species and will eventually lead to extinction. Many species also cannot adjust to changing sea levels and the effects that higher sea levels have on the environment. High sea levels not only change the way that species function in the ocean, but also alter the environments that are within the ocean.
Humans are one of the biggest non-natural threats to species and their rates of survival. Humans are responsible for overpopulating the earth with their species. Humans are also responsible for deforestation and air pollution that can be detrimental to many different species. Humans also use other species for their survival, such as the use of meat from animals. Hunting for survival, in combination with other human factors and natural causes, can result in the extinction of many different species.Learn more about Biology
For years, certain scientists have been trying to bring back extinct species - a process called de-extinction - but as of 2015 most have been unsuccessful. In theory, it is possible to bring back an extinct species, but it also brings up ethical questions and further complications that go beyond simply replicating an animal.Full Answer >
The age of a seashell is dependent on a number of factors, including species of the animal carrying the shell. For bivalve organisms, the age of the shell can be determined by looking at cross-sections of the shell. An alternation in color is thought to represent a year's growth.Full Answer >
According to the University of Colorado, diatom species are very particular about the water chemistry in which they live, and have a distinct range of pH and salinity where they grow. They also have specific tolerances for other environmental variables, which makes them suitable to be used in environmental assessment and monitoring. In addition, fossil diatoms can be used to determine conditions of the past.Full Answer >
According to Smithsonian National Museum of Natural History, Homo sapiens is the species to which all human beings living on earth today belong. The species evolved in Africa some 200,000 years ago at a time when its living environment experienced a drastic climate change. Just like other forms of early man living at the time, Homo sapiens were hunters and gatherers and acquired behaviors that helped them survive.Full Answer >