Biology SBI3U-C Unit 5 Lesson 17 Key Questions: 53. Using the shark anatomy picture and the key provided, classify the 10 sharks labelled 1-10 in the diagram below. 1) Rajidae 2) Alopiidae 3) Pristiophoridae 4) Isuridae 5) Sphrynidea 6) Scapanrhynchidae 7) Hexanchidae 8) Rhinocodontidae 9) Dasyatidae 10) Carcharhindiae 54. Explain what is meant by binomial nomenclature. Binomial nomenclature is a system in which every species has a two-part name. The system is based upon similarities that exist among common organisms so that the more closely related organisms share the first part of their name. 55. a) Which two of the following three species are more closely related: Entamoeba histolytica, Escherichia coli, Entamoeba coli? Explain. Escherichia …show more content…
They expand rapidly and spread quickly over wide areas, and out-compete or prey on native species. While all invasive species are non-native species, not all non-native species are invasive unless they meet these guidelines. If they are useful and not harmful to the ecosystem, the non-native species will not be considered invasive. 66. In a survey of a stream bank in northeastern Ontario, a local naturalist group found that 20% of the plant cover was made up of purple loosestrife. Briefly describe two possible reasons for the presence of this invasive species on the stream bank. The seeds or spores of this plant could have been accidentally introduced when goods were shipped from other continents. This plant, the purple loosestrife is native to Europe and Asia, so when goods have been transported from there, they could have been introduced to our ecosystems. It also could have been introduced unintentionally, since it was sold in packets of flower seeds for gardeners. This plant is invasive in wet soil, so it could have unintentionally been planted near the stream bank, invaded the ecosystem and then drove out other native wetland