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SBI3U Diversity of Living Things Unit Test ANSWER KEYTotal: /38Multiple Choice (10 marks)Select the letter of the best answer below.1.Which species concept focuses on the evolutionary relationships among organisms?a.Morphological species conceptb.Biological species conceptc.Phylogenetic species conceptd.Taxonomic speciesconcepte.Hierarchical species concept2.Which statement about evidence for the endosymbiotic theory of eukaryotic evolution is false?a.The two organelles that present the strongest evidence are the nucleus and the cell membrane.b.Mitochondria and chloroplastsreproduce by binary fission.c.The gene sequences in mitochondria and chloroplasts closely match those of living prokaryotes.d.Ribosomes of mitochondria and chloroplasts are structurally similar to those of prokaryotes.e.The membranes of chloroplasts and mitochondria are similar to those of living prokaryotes.3.While viewing some pond water with a microscope, you see a unicellular organism with a flagella but lacking a membrane-bound nucleus. What Kingdom would you place this organism in?a.Eubacteriab.Plantaec.Protistad.Fungie.Animalia4.Some scientists study how the fang mechanism of cobras differs from the fang mechanism of rattlesnakes. Other scientists study how the wings of bats evolved from the forelimbs of their ancestors. In both cases, what are these scientists studying?a.The biodiversity of these animals.b.The species diversity of these animals.c.The nomenclature of these animals.d.The taxonomy of these animals.e.Themorphology of these animals.5.What is wrong with the way this species name has been written? Acer Canadiensa.It should not be italicizedb.It should be underlinedc.Acershould not be capitalizedd.Canadiensshould not be capitalizede.NeitherAcer or Canadiens should be capitalized6.What is the term used to describe an organism that captures energy from sunlight to produce its own energy-yielding food?a.Autotrophb.Heterotrophc.Consumerd.Decomposer
SBI3U Diversity of Living Things Unit Test ANSWER KEYTotal: /387. In vascular plants, xylem allows for which process?a.Transport of large molecules like sugar from the roots.b.Transport of water and minerals from root systems.c.Gas exchange that occurs in the leaves.d.Absorption of sunlight to help with photosynthesis.e.Storage of food in the form of glycogen.8. Which statement about viruses is true?a.They contain only RNA.b.They replicate only in eukaryotic cells.c.They cannot replicate independently outside of a living cell.d.They cause disease but only in humans.e.They contain membrane-bound organelles.Short Answers Answer the questions below. Point form is acceptable. 9. List three (3) differences between prokaryotic and eukaryotic cells. (3 marks)Prokaryotic cells do not have a membrane-bound nucleus, whereas eukaryotic cells do. Eukaryotic cells have a more complex internal structure than prokaryotic cells (the presence of organelles), and are about 1000x larger.10. A pitcher plant (Sarracenia purpurea) is an Ontario bog plant with leaves that hold water in which various organisms live. Is a pitcher plant a species or an ecosystem? Explain your answer. (2 marks)An ecosystem consists of all the biotic and abiotic components in a given area interacting with one another. Thus, a pitcher plant itself would not be an ecosystem, as the soil and sunlight in the area are also part of the ecosystem. It is species instead.11. As birds evolved they developed the ability to fly, which gives them much greater mobility than most animals. How are laying and incubating eggs outside of the body an adaptation for flying? (2 marks)Laying and incubating eggs outside of the body became an adaptation because it is difficult to fly with eggs inside the body, as the weight is too heavy. The ability to fly would be a useless adaptation if birds were immobilized during reproductive seasons.