Structure of Animals
Two animal phyla that can be compared and contrasted are Nematoda and Annelida. Nematoda are roundworms. There are more than 15,000 known species, with scientists estimating there may be as many as half a million species yet to be discovered (Waggoner, 2009). Nematoda have a worm-like appearance outside and a simple internal body structure. The phylum Annelida includes earthworms and their relatives, leeches, and a large number of mostly marine worms known as polychaetes (Waggoner, 2006). Annelids are characterized by their segmented bodies. They also have bristles on their bodies. It is estimated there are approximately 9,000 species of annelids today.
The Animal Phylogenetic Tree ("Mastering Biology," 2012) is a useful visual learning aid that is helpful in demonstrating the similarities and differences between these two phyla. The first diagram shows eight phyla, of which Nematoda and Annelida are two. Only one of the phyla, Porifera, is not characterized by symmetry. Cnidaria...
The Heifer, the Goat, and the Sheep, in Company With the Lion illustrates the absolute power of the feudal lord (the lion) over the peasantry (the goat and sheep). This fable may be referring to the division of taxes and possessions, or it may be a direct reference to the hunting rights of feudal lords. The feudal lord (lion) declares that a stag killed by the goat is his, by
Human Response to Physical Structure: Environmental psychology is a branch of psychology that focuses on explaining human behavior in relation to the physical environment. In this case, the physical environment basically incorporates plants, animals, and material objects that have a significant impact on behavior at various levels. However, this branch of psychology does not focus on the interactional procedures among people as emphasized on other branches of psychology. In analyzing human
But saving animals is not the only concern. The spokeswoman at the time, Laura Satlter, noted that "By helping the animals we're helping the people because livestock is an important part of their lives, as food and as an economic resource" (Rodriguez). More recent disaster efforts have taken place after Hurricane Katrina and the 2004 Asian tsunami, and are currently underway in Haiti and Japan. The most potentially influential and
Like most other animals, the artic fox's cot changes to reflect the summer arctic habitat, becoming a brown or gray color that matches the summer environment (National Geographic, 2008). The photograph by Norbert Rosing (National Geographic, 2004), demonstrates the usefulness of the animal's camouflage: (Norbert Rosing, National Geographic, October, 2004, online at http://ngm.nationalgeographic.com/ngm/finaledit/0410/,2008). The artic fox contributes to the balance of nature because its diet includes rodents, which have a
Abstract The relationship between a predator and a prey is quite essential to the dynamics in the wild. Various classic approaches have been employed in the attempt to predict and comprehend the nature of the consumptive interaction between a predator and a prey (Schmitz, 2017). Using this approach has not yielded any sufficient insight on the context and complexity that is characteristic of the relationship between predators and preys. Schmitz (2017)
This issue was put in front of the public with the story of Keiko, a killer whale that was badly abused in a Mexican facility. Eventually, Keiko was moved to a better aquarium in Oregon, but activists insisted that Keiko should be released to live in the wild (Staff writers, 1997). In fact, people have worked for animal rights since the 1860's when the first Society for the Prevention
Our semester plans gives you unlimited, unrestricted access to our entire library of resources —writing tools, guides, example essays, tutorials, class notes, and more.
Get Started Now