Searches and Seizures Essay Example | Topics and Well Written Essays - 1500 words

Searches and Seizures - Essay Example A search usually occurs when an expectation of privacy that is considered by the society as reasonable is infringed by a government employee. A seizure is the interference of the possessory interest in property of a person. The Fourth Amendment protects a person against any search and seizure which that violates their reasonable expectation of privacy (LaFave, 2004). A reasonable expectation of privacy exists if one expects privacy and if the expectation is thought to be legitimate by the entire society. The Fourth Amendment Mary Ellis was awakened on Saturday morning and finds her neighbor Mr. Clyde Stevens lying unresponsive on the floor. She calls 911 and the police and EMS personnel arrived minutes later and Mr. Stevens is pronounced dead from a large butcher knife in his back. Crime scene investigators then started investigating William’s bedroom as the crime scene without any search warrant. The investigations started shortly after the arrival of the police officers. The investigators took charge of the investigation and conducted an exhaustive warrantless search on the Mary Ellis apartment which included development of blood fingerprint, photographing the print and recovery of a blood sample of William for a DNA analysis. The Fourth Amendment prohibits any government official from searching a home without any warrant which must include specific information like the name and address of the person. The Fourth Amendment requires all searches and seizures to be reasonable. If the search and seizure are declared unreasonable, then the police cannot use the evidence obtained from the search and seizure in criminal trials. Warrants are issues under a probable cause which should be supported by Oath or Affirmation which describes the place to be searched and the persons and things that need to be seized (Chamelin, 2003). A judge can only find a probable cause though the examination of the totality of all the circumstances presented. However, the police ca n enter a private residence without a warrant if an officer enters a building or a place of residence to assist in any form of emergency if the officer receives consent to search the residence without a warrant, if an officer has placed the person under arrest and if the search is administrative in nature which is done for the purposes of law reinforcement. The police can also enter a private residence without a warrant if they suspect that the house harbors a person carrying or in control of firearms illegally and are not in proper control of the arm and may injure or kill a person as a result of their mental condition (LaFave, 2004). They also enter a private residence without a warrant if they have a reasonable ground to suspect a firearm offence if the house contains illegal drugs and if someone in the house is at large after escaping from prison. The legal rights of the police to access the Ellis household The search done on Ellis household is not constitutionally permissibl

Roles of Mycorrhizae Research Paper Example | Topics and Well Written Essays - 5000 words

Roles of Mycorrhizae - Research Paper Example The roots provide the microorganisms a stable access to nutrition. In return, the roots benefit from the high water and mineral absorptive capacity of mycelia resulting from its relatively small size and subsequent better ability to penetrate soil. As a result, mycorrhizal plants are more resistant to lack of water. They are more capable of colonizing barren land or unfamiliar territory than plants without mycorrhizae do. In addition, mycorrhizal fungi process demineralized phosphates such that the minerals will be available for plant use. However, as is the case in all biological interactions, not all mycorrhizae are mutualistic. In cases in which nutrients are abundant in the plant’s environment, association with microorganisms, as is what happens during mycorrhizal formation, may be more parasitic than beneficial (Bucher, 2007). However, current agricultural practices prevent the formation of these mycorrhizae. The pesticides being used have a non-discriminating adverse eff ect on the microorganisms living in the plants’ ecosystem. ... Its functions, particularly in providing nutrients and protecting the plants against salt stress and drought, are then enumerated. Its relationships with various members of its ecosystem are then discussed. Finally, the importance of these knowledge in terms of what aspects should be focused on will be suggested. DEVELOPMENT Endomycorrhizae development Figure 1 illustrates the development of endomycorrhizae. The fungal species associated with endomycorrhizae reproduce asexually. They undergo an asymbiotic phase in which spores germinate and hyphal growth are limited without the nutrients supplied by the host plant. Soon after, hyphal growth begins. This presymbiotic phase is induced by the presence of plant root exudates, which fungal hyphae penetrate to (Bucher, 2007). At the root surface, the fungal hypha develops a set of penetrating cells and is now called a hyphopodium. This now enters the root epidermis, continuing to grow into the outer, and then the inner root cortex. It then spreads intercellular along the longitudinal axis of the root. This structure of the fungus is the one called an arbuscule (Gutjahr et al., 2008). The peak of fungal development is characterized by the development of an extraradical mycelium that is able to produce and exude spores for colonization of other plants (Bucher, 2007; Frey-Klett et al., 2007). However, the development of arbuscular mycorrhizae is not synchronous, in that various colonization stages are present in one plant (Gutjahr et al., 2008). Figure 1, previous page. Development of Endomycorrhizal Development. From Bucher, Marcel, 2007. Tansley review: Functional biology of plant phosphate uptake at root and mycorrhiza