The parasite is so easily spread because it can be

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The parasite is so easily spread because it can be transmitted through such tiny droplets of saliva or a sneeze. While the common cold can easily be transmitted, it also fits into every category as to why parasite spread so easily in the first place. The abundance of hosts for the common cold is enormous since it can infect anyone, and the accessibility of the hosts is quite simple as well since the parasite is so easily transmitted through saliva or a sneeze. The common cold can also stay with you for a long time as well depending on what strain of the parasite you have, which allows the virus time to spread or transmit itself to another host during its time in your body. 4) Newly introduced, non-native predators and parasites often have devastating effects on indigenous host species. Such effects are far more severe than those caused by native predators and parasites. Why might this be so? When a new parasite is presented to an unsuspecting population, the results that transpire can be dire. An example of this would be when chestnut trees were transported to America and brought the chestnut blight fungus along with it. The chestnut blight fungus nearly destroyed all of the American chestnut trees but had no effect on the chestnut trees in Asia. This is because the chestnut trees in Asia had thousands of years to adapt to the chestnut blight fungus while it was just hitting the American chestnut trees
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for the first time. Another example would be when the cane toad was introduced to Australia and instantly became a pest that was hard to control. 5) Section 6.4 Question #1: What factors might influence trophic level efficiency? When energy is passed from trophic level to trophic level, the efficiency is often very low and usually around or under 10%. Trophic level efficiencies vary from ecosystem to ecosystem, but several factors can affect them. The amount of resources, for example, in each ecosystem can affect how much energy there is to start, and from the amount of resources comes the types and amounts of organisms that exist in these ecosystems. Other factors that can affect trophic level efficiency are found in many lakes and oceans because the biomass of the primary producers can be less than the biomass that feed on them. Since the primary producers use photosynthesis to get energy, they multiply rapidly but are constantly grazed by herbivorous zooplankton. Chapter 7 1) Section 7.2 Question #1: In which parts of the rock cycle do organisms play the most significant roles? Although they play a part in the rock cycle, organisms only play a minor role at best. The portion of the rock cycle that organisms play the most significant role, however, would be in the erosion process. During the erosion process, sediment is deposited at the
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mouths of rivers and oceans, and sometimes in these sediments can be shells, skeletal remains, and undecomposed organic matter. These sediments are calcium-rich and settle on the ocean floor, eventually becoming limestone. Coal is another sedimentary rock formed from organic matter that is transformed by the sediment.
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