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Plasmodium is a vector for mosquitos. It is a protozoan that is the causal agent of malaria, which is responsible for killing as many 855,000 people in 2013, the majority of them being children. Populations of mosquitos are strongly influenced by the availability of standing water for egg-laying and larval development. How might mosquito density, and thereby human mortality, be affected by patterns of rainfall?
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- which of the following statements about algal bloom and eutrophication is true? 1. Eutrophication is typically caused by the removal of nitrogen and/or phosphorus 2. algal blooms cannot produce toxic substances that threaten drinking water 3. when algae in an algal bloom die, decomposition produces excess oxygen, which can kill fish 4. algae populations grow when limiting nutrients become more availableIn not more than 200 words or 5 sentences, explain why or why not shark finning used in shark fin soup can induce the destruction of the coral reef ecosystem.Which of the following situations is a density - dependent limiting factor? Choose only one. - Dinoflagellates in Laguna de Bay increase in population due to an increase in organic substance in the body of water brought by water pollution.- The oil spill in Guimaras harmed many aquatic organisms in the vicinity.- Super typhoon Haiyan caused many residents to leave Tacloban, Leyte.- Population of civet cat decreases because of deforestation.
- Which of the following best describes bycatch? a. dividing catch of marine life among fishing boats b. bonus catch of marine life, such as increased numbers of intended catch c. unintentional catch of nontarget marine life in fishing gear d. catching too much of a target species of fishWhat do you think are the multiple stresses that aquatic environments are exposed to? Where do these stresses come from? List down at least three, which you think are major stresses on aquatic environments. Explain briefly why you think these are major stresses.If 100 mosquitos invade an island and have an intrinsic rate of increase of 1.2, how many will there be in 10 years?
- One direct effect of the zebra mussel invasion was a decrease in the cloudiness of the water. How did this affect species in the Hudson River ecosystem?Locusts (grasshoppers in the family Acrididae) undergo cyclicpopulation outbreaks, leading to massive swarms such asthis one in the Canary Islands, off the west coast of Africa.Of the mechanisms of density-dependent regulation shownin Figure 53.18, choose the two that you think most apply tolocust swarms, and explain why.A ghost shrimp is the dominant estuarine macroinvertebrate in the sediment along Amero-trailing coast. Describe the likely processes or activities of the ghost shrimp and how they help to maintain the health of the ecosystem.
- Why was there an outbreak of “Red Tide” in the ocean water surrounding Minamata city in the 1950’s?Based on the data (and your graph), which of the native species will be least affected by the introduction of the bullfrogs? Please provide EVIDENCE to support your CLAIM.A hypothetical protist, Protista biologica, can become inhabited by a bacterium. This bacterium receives nutrition from the protist host and produces a dangerous toxin to the host. Which choice given below best describes this relationship? mutualism parasitism symbiosis Numbers 1 and 3 can describe this relationship Numbers 2 and 3 can describe this relationship Numbers 2 and 4 can describe this relationship
