Spironucleus Mesnili Trophozoites

It lacks a backbone, but has a nerve cord that runs down its back and a rod that runs the length of its body parallel to the nerve cord that supports the body (notochord). Humans have a notochord as an embryo, but it breaks up and becomes part of the disks that lie between our vertebrae. Also shared with Amphioxus are gill arches, the bar of cartilage associated with each arch and the cartilage that form jaws, ear bones and our voice box.

One of the parts that they are divided into is called the cephalothorax which consists of the head region and the thoracic region. The second part is called the abdomen. The abdomen consists of six clearly divided segments. The chordate is not divided into parts. They all belong to the animal kingdom.

2) Why are onion root tip and whitefish blastula areas that are ideal to view mitosis?

4. Compare and contrast the structure of a fungal mycelium with the structure of a filamentous alga.

retains the bacteria’s characteristics and an outer layer that keep characteristics of the cell that engulfed it. Mitochondria and chloroplasts are very similar in size to prokaryotes. Mitochondria and chloroplasts have their own DNA and lack histone proteins, the DNA is circular and

Invertebrates are animals that do not have backbones. There are many different types of invertebrates divided into phyla. They are Porifera, Cnidaria, Platyhelminthes, Nematoda, Annelida, Echinodermata, Mullusca, Arthropoda, and Chordata. Coral are part of the phylum Cnidaria which are a type of invertebrates. They include jellyfish, sea anemones, coral and many more. All cnidarians are shaped in three ways; an umbrella, a cylinder or a bell. The cnidarian world book article states, "Every cnidarian has at least two layers of cells that form its body wall. An outer layer makes up the body covering, and an inner layer lines the digestive cavity." However in some cases there may be an third layer of cell which help support the cnidarian. They eat by opening their mouth which is at one end which leads to

Most members of the kingdom Fungi lack flagella; the structures are completely absent in all stages of their life cycle. The only

rhizopus is seen as the branching hypha ends in figure 4. The microscope slide demonstrates density of hyphae around the mid region.

Giardia lamblia is a unicellular eukaryotic protozoan organism, it is without mitochondria. G. lamblia is also referred to as Lamblia intestinalis and a few more. Most protozoa reproduce asexually and is true for G. lamblia which produces two trophozoite per cyst by binary fission. G. lamblia has two stages, a cyst stage and trophozoite stage. Meaning, if you ingested 10 cysts, soon they would reproduce and there will be 20 trophozoite in the intestines. The cyst stage helps the organism survive in its protective capsule. Giardia cysts can survive in water for up to 3 months, which makes the chances of acquiring at an increase. The trophozoite stage is its vegetative state, where the organism obtains its nourishment.

Introduction Under the phylum Playthelminthes, there is a class Turbellaria that consists of free-living invertebrate animals that survive in marine and freshwater ecosystem. Playthelminthes, also widely known as the “flatworms” are within the clade Spiralia. The class Turbellaria is known to have a ciliated projection on the ventral dermis of the body, this hair like projections help the free-living aquatic species to glide along the film of mucus it produces. Consisting of three main cell layers, the germ layer of the turbellarian are made up of the ectoderm being the very outer layer of the body, the mesoderm in middle germ layer, and the endoderm describing the inner cellular layer. The concentrated model organisms studied for this experiment is in the genus Dugesia, formerly known as Planaria.

The paramecium eats tiny algae, plants, etc. The cilia propels the food into a tiny mouth opening of the paramecium. The food is then shoved down a little tube called a gullet that leads to stuffing of the cell. The food is held in little cells

Brachiopod species in which Cornulites was the dominate epibiont almost always displayed deep, angular ribs. Cornulites larvae settled mostly between the ribs, though some instances of the tubeworm growing across the ribs was recorded. Most specimens of Cornulites appeared clustered along the commissure of the brachiopod, supporting the hypothesis that these organisms were filter feeders and the symbiotic relationship was commensalism.

Look at the photo of a Pacinian corpuscle. Notice the onion-like bulb of connective tissue. Describe briefly —

In the internal anatomy of the earthworm, the brain is difficult to find and it is on the tip of the worm. There are multiple nephridia and they are clear color segments near the membrane of the worm. The pharynx looks very bony and has a short distance in the worm. The seminal vesicles are very small, yellow and rest on the side of the worm. The seminal receptacles are very large, yellow and rest on the middle or the side of the worm.

Although both Archaeal and bacterial cells possess flagella for motility, the composition of each organism’s flagellum is very different. In bacterial cell, the flagellum is composed of a basal body, external protein filaments both are joined together by a third component called the hook.(Bacteria Flagella David Gene Morgan , Shahid Khan). In Archaeal, the protein filament is polymerised, glycosylated and very much thinner. The Archaeal flagellum is believed to be similar to the bacteria IV pilus in structure.(www.uniprot.org/keywords/974).