Flatworm Essays

Observations: During the dissection, there might have been a few things observed. Two main observations that may have been noted was the change of colour and ring like segments. It may have been noted that the back and front side of the earthworm consists of two different colours. The back side of the earthworm is referred to as the dorsal side and the front side of the earthworm is referred to as the ventral side. A distinct observation is the fact that the ventral surface of the earthworm is a

Writing assignment #3 Phylum Platyhelminthes, known as flatworms, which also include the Planarian. Animals within this phylum are the first organisms to evolve by having bilateral symmetry, meaning that their body is equally divided into left and right halves. Also by becoming triploblastic organisms, having three different tissue layers, the endoderm (inner layer), ectoderm (outer layer) and mesoderm (third layer) these structures will be the base for the adult body. They lack a body cavity and

Sexual reproduction is most common type of reproduction among the plants and animals. They are of following types; 1) Syngamy: The fusion of gametes takes place completely, if male and female gametes are produced by same cell or organism and both gametes fuse together to form a zygote, this is called as Autogamy, paramecium is its example. Another is Anisogamy in which some organisms produce two types of gametes. Both types of gametes differ from each other in their shape and size and are known

commit actions unlikely for the species affected and use them as servants. Is it possible for these parasites and fungi to evolve and start affecting humans? One of the parasites responsible for action controlling a certain type of snails is the flatworm Leucochloridium Paradoxum. It enters the snail, as the snail eats a bird dropping. The worm develops two sack-like objects, called sporocysts, which fill the snail’s tentacles and pulsate in bright colors. There are two theories concerning this example

Heredity & Evolution, Summer ‘15 Exam 4: Final Exam 1. What is a GMO (Genetically Modified Organism) and how is it different from a GEO (Genetically Engineered Organism). How is a Genetically Engineered Organism created? A Genetically Modified Organism is an organism that is altered to produce new traits in an organism. Say you want all of the peaches you grow; you want them to look bright red similar to a Red Delicious apple. You take the DNA from the apple and when you grow the peaches, you

Creek ecology conclusion The question that was investigated was, “what was the quality of the water in the U-high creek based on the macroinvertebrates found in the creek?” The purpose of this lab was to determine whether the water quality was good or bad, based on the type and number of organisms found living in the creek. One way data was collected was by observing the creek to make an original hypothesis to be proved right or wrong later. Another way was when soil, water, and algae samples were

Crayfishes are part of the subphylum Crustacea, and are part of the Phylum Arthropoda. Phylum Arthropoda have a bilateral body symmetry which means the body is divided into similar external right and left halves. The tissue organization of Phylum Arthropoda have three tissue layers, ectoderm, endoderm, and mesoderm; thus it is triploblastic. The body cavity of the phylum is coelomate meaning its organs are lined with mesoderm. Phylum Arthropoda embryonic development is protostome which means that

The Honors Earth Science classes went to the Susquehanna River to solve a problem. The problem was not knowing if the is healthy. The classes want to know if the river is healthy, because the students live near the river, and it affects the classes everyday lives. To answer the problem, the classes did a series of tests, and made physical observations at various islands in the river. The students used test kits and other tools to test pH, temperature, phosphate, nitrate, turbidity, and dissolved

Invasive Species Invasive, alien species, those which colonise, expand and out compete native species (Smith & Smith, 2009), are a major threat to our habitats, terrestrial and aquatic species, and biodiversity. Agricultural and leisure industries are affected as well as conservation welfare and the continued wellbeing of man, flora and fauna. Whole ecosystems can be distorted and the economic cost of awareness, prevention and eradication systems is substantial. Most invasive species have been

The term irreducibly complex was invented by a biochemist Michael Behe to explain that highly complex biological systems need all their individual parts to function properly. They could not have been developed through natural processes. It is quite difficult for such a system to work at all with the loss of any individual parts. The term becomes well known to application in biological systems, but seems to refute Darwin’s theory of evolution. For example, many biochemical pathways involve enzymes

Important tapeworm parasites of humans Cestoda is a class of phylum platyhyelminthes. The best-known species of this class are called tapeworms. This is a class of parasitic flatworms, their life histories are vary but they mostly live in the digestive tracts or gut of humans and other vertebrates as adult, and sometimes they are present in the bodies of animals as juveniles. All cestodes contain atleast one and often more than one host. They lack digestive tract, mouth and senory organs, they have

As stated previously invasive species consist of plants, animals, and pathogens and there are thousands of invasive species, not just in the U.S. but, in the world. The animal invasive species are separated into two categories; vertebrates and invertebrates. Vertebrate invasive species consist of the brown tree snake (Boiga irregularis), Burmese python (Python molurus bivittatus), common starling (Sturnus Vulgaris), and the wild boar (Sus scrofa). The brown tree snake is a native of Australia, Indonesia

Pond Ecosystem Investigation Lab report By: Harshal Buradkar 9 grade Introduction A pond ecosystem consists of abiotic: light intensity of the water, depth of the water, and biotic: fish, plants, bacteria, algae, insects and etc. It also contains water and plants which is the most important part of the pond. Ponds are mostly shallow with the depth of 12-15 feet in which the sun rays can touch the bottom of the pond so that plants can grow. My aim is to find out how the plant cover affect the biodiversity

Did you know that genetics play an important role in an individual’s health? According to our textbook Genetics is “the study of the general mechanisms of heredity and the variation of inherited traits.” So what exactly does that mean, you may be wondering? Humans are born with forty six chromosomes and within the nucleus we have gene’s that make us all different in our own ways. The genes that you inherit from your parents will determine your physical characteristics such as skin color, or if you

Steven Ho Biology Lab 132 Marian Wahl 4/14/15 Caffeinated Planarians vs. Spring Water Planarians Introduction: Planarians are free-living, freshwater flatworms that are found in clean, unpolluted water. Planarians live in small, shallow, slow-moving streams under stones or leaves. Planarians cannot live in chlorinated water because it is toxic to them and can kill these animals. Planarians are also able to regenerate themselves if their bodies happens to completely tear apart. The animal adheres

tapeworm infection is the infestation of the digestive tract via a species of parasitic flatworm, known as tapeworms. stay tapeworm larvae grouped in cysts are now and again ingested by means of eating undercooked meat. as soon as inside the digestive tract, a larva can develop into a very big grownup tapeworm. additionally, many tapeworm larvae cause signs in an intermediate host. tapeworm eggs are generally ingested via food, water or soil contaminated with human or animal faeces. each section

The helminth worms group involving nematodes (roundworms), cestodes (tapeworms) and trematodes (flatworms) which are widely reported with mixed infection also common (Permin et al., 1997; Poulsen, 2000). Nematodes or roundworms are the most important group of helminth parasites of poultry, worms are elongated, cylindrical and unsegmented, and most roundworms affect the gastrointestinal tract (GI tract), with an occasional parasite affecting the trachea or eye. Round worms are directely life cycle

In biology, regeneration is the process of renewal, restoration, and growth that makes genomes, cells, organisms, and ecosystems resilient to natural fluctuations or events that cause disturbance or damage.[1] Every species is capable of regeneration, from bacteria to humans.[2][3] Regeneration can either be complete[4] where the new tissue is the same as the lost tissue,[4] or incomplete[5] where after the necrotic tissue comes fibrosis.[5] At its most elementary level, regeneration is mediated

Coral reefs. By: Valentina Sarria. Coral reefs are one of the most diverse and complex habitats. They are one of the most interesting and colorful ecosystems found in the marine environment. They are very unique in many different ways and a crucial support for human life. They play also a very important role in the marine life such as giving shelter and food for millions of species including fishes, crabs, or shrimps. They support 33% of marine fish species. They also have specific and certain

Irreducible complexity This is a common point of disagreement between pro-evolutionists and anti-evolutionists. The irreducible complexity argument from anti-evolutionists states that complex structures like the human eye cannot arise from a process of natural selection and evolution alone. This is because if you take parts away from the eye it fails to function, leading one to conclude the eye must have been made in one act of creation by a supernatural intelligence, the same way a watch would have