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Advantages and disadvantages of sexual and asexual reproduction
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Do you think asexual or sexual reproduction is better for a grizzly bear? Here are some reasons why sexual reproduction is better for a Grizzly bear. Asexual reproduction is a type of reproduction that does not involve meiosis. It is the type of reproduction that a grizzly bear does not use. The purpose of asexual reproduction is so females not able to find a mate can still reproduce. Sexual reproduction is a type of reproduction that involves meiosis and the type of reproduction that a grizzly bear uses. The purpose of sexual reproduction is for females that are able to find mates easily can reproduce.
First, I chose a grizzly bear because I am more familiar with it and would like to learn more about them.This animal is big,brown,and furry.
Grizzly bears live in a variety of environments .All of which includes dense forests, subalpine meadows, open plains and arctic tundra . In the past though, they could be found from Alaska to Mexico, and from California to Ohio. Though Nowadays there are efforts trying to make it so grizzly bears can make a comeback and the wild, and all of their efforts are proving to be working, there are 4 times as many grizzlies in the wild as there were in 1975, at
Now even though these bears help the environment so will other bears. The Grizzlies are just another species of the many species of bears why are these bears more important than other bears. As we find from the GNWT: “Grizzly Bears in the NWT occur primarily in open alpine or tundra habitats, but they can also be found in forested areas. They have large home ranges relative to most other bear species. On average, a male’s range can exte...
The Northern White-tailed deer have a polygynous mating system (fcps.edu, nd). Most white tails mate in their second year but it is possible for females to become sexually active after only seven months. The male species are polygamous but may develop an attachment to a doe for several days or weeks. The female species come into heat in November for only twenty-four hours. If the female is not mated she will have a second heat...
Memories, with or without context, play a key role as plot devices in both Away from Her and “Bear Came Over the Mountain.” Used to provide context for their only semi-chronological story lines, memories in the story and movie alike give solid glimpses of the past that allow the plot to move forward. One of the most prominent memories, in both the story and the movie, and certainly the clearest of the latter, is the section in which Grant and Fiona go on a walk/ski in a park. The differences between the scene and the passage are substantial, ranging from difference in message to difference in visuals. This section is an excellent example of the drastic differences sometimes found in adaptations, and allows for the presentation of a case for
Diane Glancy is an award winning American author. She grew up in Kansas City, Missouri, in a part Cherokee household which is what inspires her interest in teaching and writing about the Native American heritage. Glancy is from Native American descent and is also a Christian. Glancy is known for her ability to incorporate both genres into her writings. In Glany’s 1996 novel, Pushing the Bear, Glancy uses a historical novel to depict the journey of the Native American’s that walked the trail of tears. The two main characters of this novel are Maritole and Knobowtee. They are a married Cherokee couple from North Carolina. Not only does the Trail of Tears take a toll on them physically, but the trail puts their relationship to the test. Through the marriage of Knobowtee and Maritole, Glancy shows the
Although they are now rare, grizzly bears inhabit the dense forest of Montana’s Rocky Mountains. Grizzlies grow as tall as eight feet and can weigh up than 1,000 pounds, yet they can move as fast as a horse. There are six national grizzly recovery zones, and three are in Montana. They are Cabinet-Yaak, Northern Continental Divided, and Yellowstone (Av2 books).
Once ferocious beasts, bears in popular society now represent a human-like, expressive, docile, creature. Internationally, bears are used for as mascots in today’s society, examples include Smokey the Bear, Coca Cola Polar Bear, Snuggle Fabric Softener Bear, and Kumamon. These mascots are each unique in that they contribute different characteristics to the concept of virtual bears. Smokey Bear was created in 1944 to educate Americans about the prevention of forest fires. Being one of the first bear mascots used in popular media, tracking the physical appearance of Smokey
Out of an Ice Age emerged one of our most majestic creatures in the world, the polar bear. From its brown bear ancestry, the predator evolved to be a master of a harsh and unwelcoming ice kingdom. Intelligent, adaptable and fierce, the polar bear learned how to survive in a place that offers few comforts to any creature. But now that very environment is in flux. And so is the polar bear’s fate (Nature).
Natural and sexual selection are not random processes. If there is no difference between the individuals within the species there would be no selection. Sexual selection is related to mating, it acts on individual’s ability to obtain or successfully copulate with a partner. The idea of sexual selection was introduced by Charles Darwin in 1871; he revealed that there are organisms with traits which are not explained by the concept natural selection, for example the tail of a male peacock. His found two main ways in which sexual selection works, these are intra-sexual competition and inter-sexual selection. Intra sexual competition happens within species, usually between males. They compete against each other to be chosen as a mate by a member of opposite sex. Inter-sexual selection is choosing a mate among the members of opposite sex, usually done by females.
animals such as the polar bear, to mate and to prepare for the once again
Myths do tend to serve functions in cultures and everyday life. It’s important for the Modoc tribe to tell this story because it helps explain how things came to be and why there are certain respects that must be paid. They honor the grizzly bear and all of nature due to this story and respect a higher power that started it all. Modoc tribe members, locals of Mount Shasta want people to fall in love with their mountain and area just as they did so they do no harm and realize the beauty of it. There is no beauty in life without meaning. There must be a reason for why grizzlies walk on fours now and how the mountain came to be.
In order to understand the present lifestyles relating to different approaches and tactics applied by humans in mate choice preferences, there is the need to refer to Darwin (1859, 1871) evolutionary perspectives. Darwin (1871) sexual selection is the driving force for males and females reproductive quest for their genes survival. These driving forces have been classified into two categories as intra-sexual and intersexual mate selection.Intersexual selection is male sexual selection process whereby males compete with other males and the females choose the strongest as their ideal partner. Intra-sexual selection occurs when the male species fight among themselves and the strongest gain access to females for
In Alaska there are 3 main types of bears. They are brown bears, black bears, and polar bears.
The reproductive systems are based off of the goal to create offspring. Both the male and the female reproductive systems, although fueled by a similar goal, have different components and structures. Both systems are very complex in their own way, making it important for one to understand how each of the systems and their various processes work. Knowing the processes and components of the male and female reproductive systems will aid all people in their life, sometime or another. It’s important to understand how our individual bodies work and how life is produced.
Sikes, Roberts. and William L. Gannon. "Guidelines of the American Society of Mammalogists for the Use of Wild Mammals in Research." Journal of Mammalogy 92.1 (Feb. 2011): 235-253. Academic Search Premier. EBSCO. Web. 5 Oct. 2011.