Extinction of Dinosaurs Two-hundred and thirty million years ago the first dinosaur-like creature roamed the earth. Dinosaurs were a very successful and diverse group‚ dominating the terrestrial environments of the earth for 160 million years. The apparently sudden mass extinction of dinosaurs marks the boundary between the Cretaceous and Tertiary periods. Though there is not one definitive explanation to explain dinosaurs’ extinction‚ there are various theories that attempt to account for the
Premium Dinosaur Cretaceous Climate change
“Human genetic engineering is the alteration of an individual’s genotype with the aim of choosing the phenotype of a newborn or changing the existing phenotype of a child or adult. It holds the promise of curing genetic diseases like cystic fibrosis‚ and increasing the immunity of people to viruses. It is speculated that genetic engineering could be used to change physical appearance‚ metabolism‚ and even improve mental faculties like memory and intelligence”. (Wikipedia) There are many risks associated
Premium DNA Gene Genetics
The Effects of Human Activity on Climate Climate is a natural activity that can be defined as the weather conditions prevailing in an area in general over a long period of time (which can include temperature‚ air pressure‚ humidity‚ precipitation‚ sunshine‚ cloudiness‚ and winds) (“Climate”). The climate has been a part of our environment long before humans came to study it‚ and really took it into consideration. Now through the many negative environmental actions created by humans through beneficial
Premium Climate change Carbon dioxide Climate
The 6th Major Extinction An Extinction is when tens of thousands are in danger of dying out completely. A Mass Extinction is when multiple different kind of species die out completely. Human activities do the most damage to animal habitats. Human activities include Illegal hunting‚ pollution from factories‚ and moving in of an invasive species which could mess up the whole ecosystem. Another example of human activities was back in the early 1800s‚ there were about 2 billion Passenger Pigeons
Premium Extinction Endangered species Animal
Human Activities and the Loss of Natural Resources Natural resources including soil‚ water‚ forest‚ mineral and biodiversity have been repeatedly destroyed around the world by humans. “Since 1970‚ over 600‚000 square kilometers (232‚000 square miles) of Amazon rainforest have been destroyed” (Butler‚ 2011). The FAO (Food and Agriculture Organization) estimated that “soil erosion carries away a volume of soil equivalent to one metre deep over 200‚000 hectares every year in the Philippines.” In
Premium Deforestation Agriculture Evolution
14th‚ 2013 How Species Are Becoming Endangered There are so many reasons and factors that are causing all kinds of species to become endangered. Some are natural causes but others are caused by mankind. Species have been coming endangered or sometimes extinct since the beginning of time. Mankind wasn’t such a huge factor until we started to develop more and more as time continued to go on. Almost 99% of threatened species are at risk of being extinct because of human activities alone. You are
Premium Endangered species Extinction
Topic: Endangered Species Issue Question: Should Endangered Species be Protected? Since the appeared of the first life on this planet‚ numerous species come and go‚ rendered extinct by natural changes in physical and biological conditions. Because extinction is a natural part of the order‚ if there are many other species still exist‚ some people might wonders why or what so unique about the endangered species that large sum of money and effort is spent in order to save and restore them (Why
Premium Evolution Biodiversity Species
Endangered Species Endangered species are living things whose population is so reduced that they are threatened with extinction. Thousands of species are included in this category. The International Union for the Conservation of nature and Natural Resources publishes a list of threatened mammals‚ birds‚ reptiles‚ amphibians‚ and (many people do not consider them) plants .CAUSES OF EXTINCTION Millions of years before humans‚ extinction of living things was linked to geological and climate‚ the
Premium Endangered species Human Species
Loss of Species Every year a new species gets placed on the endangered species list‚ extinction is a natural process but due to human activity there has been a rapid decline in the wild species population. Loss of habitat or alteration‚ hunting‚ introduction of foreign species‚ and disease are major culprits in the extinction rate. The protection of species is an important element to the survival of biodiversity as well as human sustainability. The loss of a species means humans will lose out
Premium Biodiversity Earth Endangered species
THE CONCEPT OF SPECIES What are species? Species are the basic taxonomic units of biological classification. This grouping of organisms of "like kind" into discrete and stable units has been traced at least from the time of Plato and Aristotle. The term derives from the Latin "specere" (to look at‚ to behold)‚ with the meaning of "kind‚“ "quality‚" "appearance‚" "shape‚" or "a peculiar sort.“ In the past‚ species were classified according to their shape. Carl Linnaeus (1707-1778)‚ the
Premium Evolution Gene Natural selection