PPT-Parasitism (ii):

Transmission and virulence CfE Advanced Higher Biology Unit 2 Organisms and Evolution SQA mandatory key information Transmission is the spread of a parasite to a host Virulence is the potential of a parasite to cause harm to a host A higher rate of transmission is linked to higher virulence Factors that increase transmission rates include the overcrowding of hosts at high density or mechanisms that allow the parasite to spread even when infected hosts are incapacitated Vectors and waterborne dispersal stages are examples of the latter . Please note that all persons wishing to trap cowbirds must be certified through an approved training program before the trap is put into operation This training is offered at no cost by Texas Parks and Wildlife TPW and affords the landowner with per 3 Macroparasites:platyhelminth worms (tapeworms, trematodes)(intestinal) nematodeslice, fleas, ticks, mites, fungi1.Directly transmitted from host to host 2.Indirectly transmitted via some other speci Most organisms have adaptations that help protect them against their predators. Cacti have thorns. Porcupines have quills. Monarch butterflies have toxins and . protective . colouration. The interactions between producers and consumers typically result in co-evolution. Essential Questions. What is symbiosis?. List and describe (in your own words) the 5 main types of symbiosis.. Give an example for each type of symbiosis.. How Species Interact with Each Other. -Niche:. Can you think of examples of relationships where both people/ organisms benefit?. Can you think of examples of relationships where one organism benefits while the other is harmed?. Symbiotic Relationships. Mutualism. Mistletoe grows on trees. It sends its roots into the tree and uses the nutrients that could otherwise be used by the tree. Therefore, the tree does not get to use all the nutrients and usually dies.. Conspecicbroodparasitism(CBP)isataxonomicallywidespreadreproductivetactic.OneoftheearliesthypothesesputforwardtoexplaintheevolutionofCBPwas Predation. The capturing of prey as a . means of maintaining life. One organism benefits . One organism is killed. Competition. Competition. – A rivalry between organisms for the same resources; The fitness of one of the organisms is lowered by the presence of another.. Winner takes all. Adaptive techniques predator. Keen eyesight, hearing, sense of smell and dentition suitable to killing prey.. Camouflage, which allows the predator to be concealed while hunting its prey.. Brood parasitism in CRW wood ducks: What type and location of nests are most susceptible to brood parasitism in the Cache . River Wetlands?. . Humans harness water for their own purposes, (e.g., maintaining our water supply or using water systems for transportation). . 7.EC.5B.1 Develop and use models to explain how organisms interact in a competitive or mutually beneficial relationship for food, shelter, or space (including competition, mutualism, commensalism, parasitism, and predator-prey relationships).. th. Grade Science. Objectives of the Symbiotic Relationships Lesson. Students will investigate how organisms or populations interact with one another through symbiotic relationships and how some species have become so adapted to each other that neither could survive without the other. (Ohio Academic Standards LS 7.1). Abiotic Factors. Topography. Temperature. Water. Abiotic Factors. Soil Content. Sunlight. Communities and Populations. Communities . Assemblage of different populations that live together in a defined area.. According to Elton, the union of parasite and host is usually an elaborate compromise between extracting sufficient nourishment to maintain and propagate itself and not impairing too much the vitality or reducing the number of its host which is providing it with a home and free ride..