Essay, Research Paper: Dinosaurs 


Free Biology research papers were donated by our members/visitors and are presented free of charge for informational use only. The essay or term paper you are seeing on this page was not produced by our company and should not be considered a sample of our research/writing service. We are neither affiliated with the author of this essay nor responsible for its content. If you need high quality, fresh and competent research / writing done on the subject of Biology, use the professional writing service offered by our company.

Dinosaurs: How they became extinct Something happened 65 million years ago, at
the end of the Cretaceous period, something so devastating that it altered the
course of life on earth. It seems like it happened so sudden, as geologic time
goes, that almost all the dinosaurs living on earth disappeared. So how did
these dominant creatures just die off? Was it a slow extinction, or did it
happen all of the sudden? These questions bring rise to many different beliefs
on how the dinosaur disappeared over 65 million years ago. Extinction itself is
easily defined: When the birth rate fails to keep up with the death rate, it is
called extinction. But, the definition does not answer the question about the
nature or causes of extinction. Paleontologists generally divide extinctions
into two types, for that of different causes arose. The first is called
background extinctions, isolated extinctions of species due to a variety of
causes. Included is out competition, depletion of resources in a habitat,
changes in climate, the development or destruction of a mountain range, river
channel migration, the eruption of a volcano, the drying of a lake, or the
destruction of a forest, grassland, or wetland habitat. The second type of
extinction is called mass extinctions. There are four main components involved:
Large numbers of species go extinct; many types of species go extinct; the
effects must be global; and the effects must occur in a geologically short
period of time.1 The dinosaur could not have lived for ever. No creatures, no
plants, no tiny bacteria are forever, not even Homo sapiens. Extinction is the
fate of all species. One theory on how the dinosaurs became extinct is that of
carbon dioxide, and the ³greenhouse effect². Volcanoes produced the proposed
conditions. A massive volcanic eruption could have saturated the atmosphere with
carbon dioxide so that it caused a sharp rise in temperatures worldwide. The
excessive carbon dioxide would have permitted solar energy to enter the
atmosphere but would have blocked the radiation of most surface heat back out
into space, therefore causing the ³greenhouse effect². Rising temperatures
could have killed off or reduced the activity of plankton, disrupting food
chains and also messing up the plankton¹s normal role in converting carbon
dioxide to oxygen through photosynthesis. From there it would not have been long
for all the dinosaurs to have been suffering, and then to become extinct.
Good or bad? How would you rate this essay?
Help other users to find the good and worthy free term papers and trash the bad ones.
Like this term paper? Vote & Promote so that others can find it

Get a Custom Paper on Biology:

Free papers will not meet the guidelines of your specific project. If you need a custom essay on Biology: , we can write you a high quality authentic essay. While free essays can be traced by Turnitin (plagiarism detection program), our custom written papers will pass any plagiarism test, guaranteed. Our writing service will save you time and grade.

Related essays:

Dissection of an adult bullfrog's central nervous system (CNS) Experiment consists of the dissection and analyzation of a bullfrog’s nervous system. Dissection consists of the isolation of the CNS con...
For those who follow the rules of good nutrition by eating healthy foods, the rewards can be substantial. But it's also important that you clean and cook your food properly. Because if you don't, ce...
Biology / Erwin Chargaff
Erwin Chargaff, born 1905 in Czernowiz, Austria, was a pioneer in biochemistry contributing to the understanding of DNA. He, in 1928, earned his doctoral degree in chemistry at the University of Vienn...
Ever since the publication of Charles Darwin's The Origin of Species was published, there has been an ongoing debate between science and religion. Scientists have formulated many theories as to the or...
Charles Darwin’s introduction of evolution, created the battle between evolution and religion. Still, to this day, the influence of Darwinism has people asking themselves where they came from. God, a ...