The world we live in today is full of an exceptional variety of animals. The time it took to conclude to the various sorts of species seen today has been throughout a period of millions of years. The vast majority of these animals are accredited to evolutionary advancements. When the environment changes, organisms have become accustomed to changing to fit their environment, to ensure their species does not die off. These physical changes have resulted in different phyla, ranging from basic structures
Annelids: I learned that the phylum Annelids can consist of many creatures such as earthworms, leeches, and scale worms can adapt to a variety of environments. Annelids’ bodies are divided into segments which are seen as rings by the naked eye. They have muscles which help them move by contracting their longitudinal and circular muscles. When Annelids take in food, the food particles travel through one end of the body and are excreted out the other side. The video enhanced my understanding about
Flatworms belong to the phylum Platyhelminthes. They have the simplest body plan of all bilaterally symmetrical animals. They are called flatworms because their bodies are compressed. The mouth is the only opening into the digestive cavity the flatworms have. Food is taken in through this hole and wastes are discharged also through this hole. Flatworms have a well-defined nervous, muscular, excretory, and reproductive system. The flatworm distributes the food it digests through a digestive tube that
Introduction Fossil records indicate life has existed on this planet for at least 3.8 billion years. Most species that have ever existed are now extinct, yet the diversity of life on Earth is still so tremendous and complex scientists estimate there are 10-100 million species yet to be documented. Those that have been documented, have been categorized it into three domains, six kingdoms, twenty-nine phyla, and countless more subdivisions. Seemingly in spite of this diversity, a common ancestry unites
Full Nefertiti of Egypt declared them sacred. Aristotle known as them the digestive tract of the world. Charles Darwin felt they performed a significant part within the history around the globe. What animal gained the admiration of these celebrities? The common-or-garden earthworm. Because you will see, earthworms should be respected. True, they're slimy plus they wriggle. But even these characteristics, which we may consider unattractive, can inspire a feeling of awe when you become familiar with
The Lumbricus Terrestris is the scientific term for the common Earthworm, and is otherwise known in the United States as the Nightcrawler. Earning this name due their habit of not appearing above ground to eat until the dark hours of the day, these segmented worms made up of annuli have the ability to dig six and a half feet deep into the soil. They commonly become seven to eight centimeters in length, and spend a lot of their time eating using their mouth which is located in the first segment of
The clouds roll by saturated with teardrops, evidence of the burden they carry. Pure blue is wiped from the sky, replaced by a gun-metal gray shot through with a bruised night. The trees shudder with chills as they brace themselves for the downpour. Then, the clouds slow down, dragging themselves forward, bogged down by the weight of their luggage. A few tears spill, darkening the earth at the points of contact. They pause. Should they move on, move just a little bit farther? No, thunder and lightning
Most animal phyla originated in a relatively brief span of geological time, however the diversity among them is extraordinary. Every organism is very unique a detailed in certain ways, comparisons of certain types of organisms can be very difficult. The class in which will be compared is that of the invertebrates. The main difference between coelomate and acoelomate body plans are that coelomates have a true coelom, which is a fluid-filled body cavity completely lined by tissue which is derived from
Annelids do have a body cavity and their body structure is round instead of flat. Annelids do not have a dead gut they have a mouth at one end and an anus at the other. While flatworms are unsegmented annelids are segmented worms. Flatworms have longitudinal muscles while annelids have circular muscles. This is one of the advances that make them advanced over the flatworm’s simple body plan. Annelids have a head which is followed by body segments throughout
Hydrothermal vents are among the most diverse and biologically active ecosystems of the ocean. At these locations, seawater penetrates through the cracks in the crust until it reaches hot heated magma rock. The seawater is heated and converted into hydrothermal fluid. These hydrothermal fluids then rapidly diffuse through the seafloor as black jets of superheated fluid or water rising from cracks in the deep ocean seafloor. This interaction between superheated hot hydrothermal fluid from the crust
used to justify the similarities in eye types seen in organisms of different species. This analysis begins with the simplest of eye forms composes of single cells, present in the zooplankton larvae. Such primitive forms are identified in mollucs, annelids, cnidarians, and are then compared to more advanced eye forms contain lenses. This comparative approach provides a breadth of examples of vertebrates and invertebrates, making visible, the diversity of eye morphology within the animal kingdom.
The aetobatus narinari, or more commonly known as the spotted eagle ray, is a member of the chordata phylum. (2) Being a part of the chordata phylum means they have unique characteristics such as: their notochord, a dorsal hollow nerve chord, pharyngeal slits, and a post anal tail. There are many reasons this animal is so intriguing, including its diversity and health, physiology, behaviour, and ecological challenges it faces. Spotted eagle rays are found throughout tropical warm waters in: the
Introduction Synthesis is the process of producing a chemical compound usually by the union of simpler chemical compounds. For example, photosynthesis, the word photo means putting together with light. Photosynthesis is the process of converting sunlight into food for organic organisms such as plants. Photosynthesis is the basis of life for planet earth and without it; not only would we not be able to produce the fruits and vegetables that we consume, but the food to feed the animals that we eat
Jean Baptiste Lamarck had eight children and three different wives. His first wife, Marie Rosalie Delaporte gave birth to six of his kids before she died in 1792. They did not get married until she was dying. His second wife, Charlotte Victoire Reverdy gave birth to two children, but died two years after they were married. His third wife, Julie Mallet, died in 1819. It is said that Lamarck had a fourth wife, but it has not been proven. However, he had a deaf son and another son who was clinically
Introduction Eutrophication is a widespread matter of concern affecting estuaries and other coastal ecosystems, and detrimental to coastal and marine species (Gray, Wu & Or 2002; Bricker et al. 2008). Gray, Wu and Or (2002) describe the eutrophication process as an increase in different nutrient levels resulting in creation of both dissolved and particles of organic substance which ultimately leads to decrease in level of oxygen concentrations due to decaying or degeneration of those organic substances
that could not, died off and became extinct. Because of early organisms' ability to adapt, many of the animals alive 543 million years ago, in the Cambrian Age, are alive today. Animals like Echinoderms, now the modern starfish and sea cucumber; annelids and priapulidas, now worms; chordates, mammals and anything with a backbone; arthropods, including insects and spiders, crustaceans and scorpions are such animals that have been evolved from early animals alive more than 500 million years ago.
bacteria. There is fossil evidence of them from as early as 3.4 billion years ago. The first mulitcelled organisms have fossil evidence that dates back to about six hundred million years ago. The main forms of life consisted of sponges, cnidarians, and annelids. Paleozoic Cambrian Geologic The Cambrian time period was the first in the Paleozoic era. It lasted about fifty-three million years. As the period started, the continents started to pull apart. Land masses were scattered. During this time period
The Cambrian Explosion: Proof of ID? In our studies of Intelligent Design (ID) theory and Creation Science, I found little information that seriously challenged the theory of evolution. However, there was one event that appeared to defy the logic of Darwinian gradualism: the Cambrian Explosion. This event was presented by ID theorists as proof of design--something which science is unable to account for. Unfortunately for ID proponents, this is not the case. There are several scientific explanations
Convergent evolution is the process in which organisms which are not closely related derive akin traits separately due to the need for adaptation to similar environments or ecological niches. According to the neo-Darwinian view, species with similar environmental living settings experience similar selection pressures. Natural selection then acts on the arbitrary changes or current genetic variability leading to identical phenotypic solutions. There may be resemblances at a phylogenetic level, but
Up until 1947, it was believed that the Cambrian Explosion marked the first true abundance of multicellular life. However, this was discovered to be untrue after Sir Douglas Mawson and R.C. Sprigg mistakenly came across numerous "fossil jellyfish" in the Ediacara Hills while observing what was originally believed to be sandstones belonging to the lowest strata of the Cambrian. At first, these finding were dismissed as "fortuitous inorganic markings."(AAS Biographical Memoirs.) Several years later