The Platyhelminthes includes three classes: the Turbellaria (free-living flatworms), the Trematoda (flukes), and the Cestoda (tapeworms). What are the major classes of platyhelminthes? Platyhelminthes are traditionally divided into four classes: Turbellaria, Monogenea, Trematoda, and Cestoda (Figure 2). What are the 4 classes of flatworms? Some modern evidence suggests that at…

In the 19th century, Brazil dominated the global market in natural rubber – but not any more. The country now accounts for less than 1 per cent of world production, and the reason is a fungus called Microcyclus ulei, which attacks the leaves of rubber trees. It has caused a…

Four, trigeminal, abducens, facial and acoustovestibular, are located in the pons. The remaining four, glossopharyngeal, vagus, accessory and hypoglossal are located in the medulla. It is most useful however to discuss them, not related to location, but rather as to function. What are autonomic nerves? Summary. Your autonomic nervous system…

54 countries There are 54 countries in Africa today, according to the United Nations. … Countries in Africa: # 6 Country South Africa Population (2020) 59,308,690 Subregion Southern Africa Do any countries in Africa have states? There are 54 sovereign states (or countries) in Africa – see the list below…

Translation: If something is brittle it is easy to break or snap. This is one of the properties of a material. Some of the elements on the right side of the periodic table are brittle. What is brittle example? Brittle materials have a small plastic region and they begin to…

To be able to participate in a buyback process, the investor should be have held the shares of the company before the record date declared by the company in its announcement for buyback. The shares should be held in demat form. The last date for tendering of shares for buyback…

In an electrical signal, the voltage, current, or frequency of the signal may be varied to represent the information. Any information may be conveyed by an analog signal; such a signal may be a measured response to changes in a physical variable, such as sound, light, temperature, position, or pressure.…

Ethanethiol | C2H5SH – PubChem. What intermolecular forces are present in C2H5SH? Since ethanol exhibits the same intermolecular force as water, the two are completely miscible with one another. Ethanethiol (C2H5SH) exhibits dipole-dipole interaction: sulfur is not that electronegative which is why hydrogen bonding does not occur. What is a…

Actinomyces oris is one of the predominant organisms colonizing the oral cavity and plays a role in dental plaque formation. This species previously belonged to the A naeslundii/A viscosus group. Can Actinomyces grow aerobically? Actinomyces Species Actinomyces cannot be distinguished from Nocardia on Gram stain. However, Nocardia spp.grow aerobically and…

The subscapularis muscle internally rotates the humerus; the upper portion of the muscle influences abduction, while the lower area influences adduction. How do you internally rotate your arms? Which muscles are responsible for internal rotation? The muscles of internal rotation include: of arm/humerus at shoulder. Anterior part of the deltoid…

Top 10 most reliable auto manufacturers Mazda: reliability score 83.7 per cent. Lexus: reliability score 83.0 per cent. … Suzuki: reliability score 82.0 per cent. … Subaru: reliability score 81.7 per cent. … Hyundai: reliability score 81.6 per cent. … Mitsubishi: reliability score 81.2 per cent. … Kia: reliability score…

Pycnocline is a layer where there is a rapid change in water density with depth. In freshwater environments such as lakes this density change is primarily caused by water temperature, while in seawater environments such as oceans the density change may be caused by changes in water temperature and/or salinity.…

Preganglionic parasympathetic neurons are found in the medulla oblongata where they form visceral motor nuclei; the dorsal motor nucleus of the vagus nerve; the nucleus ambiguus, the salivatory nuclei, and in the sacral region of the spinal cord. What is autonomic neuron? The Autonomic Nervous System (ANS) is the involuntary…

Behavioral finance asserts that rather than being rational and calculating, people often make financial decisions based on emotions and cognitive biases. For instance, investors often hold losing positions rather than feel the pain associated with taking a loss. How do you explain portfolio theory? Portfolio Theory is concerned with risk…

Ribose is a single-ring pentose [5-Carbon] sugar. What is the formula for a 5 carbon sugar? C5H10O4 A five carbon sugar with molecular formula C5H10O4. What are the 5 sugars in DNA? Pentose sugars – 5-Carbon sugar 1) Deoxyribose – in DNA 2) Ribose – in RNA b. Phosphate group…

Atomic force microscopy (AFM) is a powerful technique that enables the imaging of almost any type of surface, including polymers, ceramics, composites, glass and biological samples. AFM is used to measure and localize many different forces, including adhesion strength, magnetic forces and mechanical properties. How does an atomic force microscope…

yolk In the unincubated egg the blastoderm lies freely on the surface of the yolk, but after about 12 h of incubation it has become attached to the inner surface of the vitelline membrane. What is the difference between blastula and blastoderm? Blastula consists of a spherical cell layer known…

The bifurcated system developed involves a trouser graft with one long leg and one short. This graft-system is delivered through one femoral artery with deployment of the proximal aortic end infrarenally and the longer trouser leg within the ipsilateral common iliac artery. What is a GORE TEX vascular graft? Improving…

The parasitic adaptation can be defined as the profound changes and modifications occurring in per-suit of successful living so that the parasite is fully adapted inside the body of the host. What are the five adaptive features of parasite? These are: 1) avoidance of parasites; 2) controlled exposure to parasites…

Some fur bearers are edible, with lynx, muskrat and beaver commonly eaten. Muskrat and beaver meat are used as trapping bait, too. … Other trappers tell me marten meat is not good trapping bait, either, so I guess they must not taste very good. What is marten fur used for?…

All T-cells have a receptor to recognize antigen. … The T-cell receptor is also associated with another group of molecules called CD3 — these molecules send a message into the cell whenever antigen binds to the T-cell receptor. How does an antibody recognize an antigen? Antibodies recognize foreign invading microorganisms…

The free autogenous gingival graft is an excellent surgical procedure for treating gingival extension. It is a procedure that can be performed rapidly with little postoperative trauma to the patient. What is autogenous connective tissue graft? Autogenous Graft Procedures This is the most common method used to treat root exposure.…

Peanuts have the highest level of arginine among foods (USDA SR-21). Arginine is an amino acid that is a precursor to nitric oxide that helps to keep the arteries relaxed, improving blood flow and healing time in tissues in the body (Moncada and Higgs 1993). Do peanuts have a complete…

These infections usually occur during warm weather months, when mosquitoes and ticks are active. Examples include California encephalitis, Chikungunya, dengue, Eastern equine encephalitis, Powassan, St. Louis encephalitis, West Nile, Yellow Fever, and Zika. What are the 4 major disease vectors? Disease vectors Malaria (protozoan): Anopheles species of mosquito. Lymphatic filariasis…

The aim of the Immigration Act 1971 was to control and restrict this perceived large-scale immigration into the UK. In particular, the Act was enacted to prevent citizens from Commonwealth countries settling permanently in the UK. What did the Immigration Act do? The Immigration Act of 1924 limited the number…