SI Bio 211 Practice Exam I Part II9.12.7 Mayfield21. Bacterial flagella are made of what?A) carbohydrateB) peptidoglycanC) silicaD) DNAE) protein22. Bacteria which require complex organic molecules in their food are called ___________a. aerobesb. anaerobesc. heterotrophsd. chemoautotrophse. chemoheterotrophs23. Bacteria which live on your skin without causing disease are described as having what kind of symbiotic relationship with you?a. commensalismb. mutualismc. parasitismd. pathogenesise. heterotrophism24. Which of the following statements describes the least important reason why bacteria are important to human life?a. Bacteria play critical roles in essential chemical cycles in the biosphere.b. Much of our food consists of bacteria.c. Without bacterial disease, humans would be disease free.d. In the food chain, animals eat plants, and plants obtain nutrients from bacterial activity in the soil.e. Fixation of nitrogen.25. Some bacteria cause disease in people. Identifying the bacteria that causes disease is not always easy. What constitutes proof that a particular strain of bacteria causes a particular disease?a. Infection of an animal with the organism.b. Isolation of the bacterium from a diseased personc. Isolation of the bacterium from a sick animald. Demonstration that related bacteria cause diseasee. Satisfying Koch’s postulates26. What is an antibiotic?a. A chemical which kills cells.b. A chemical which kills prokaryotic cells but not eukaryotic cellsc. A chemical which kills eukaryotic cells but not prokaryotic cellsd. A chemical which kills bacteria and virusese. A protein produced by the immune system to kill bacteria27. Which of the following statements is/are consistent with the "symbiotic theory of eukaryotic origins"?a. Eukaryotic cells are desended from several different and more ancient cell types.b. The nucleus and the mitochondria are descended from different ancestors.c. All mitochondria are descended by direct lineage from a single ancient free living bacterium.d. Choices a and b are correct,but c is not.e. Choices a, b, and c are all correct28. Given below are pairs of organisms. Which pair does not have a common multicellular ancestor?a. mosses and fernsb. brown algae and red algaec. mushrooms and bread moldd. a fly and a cowe. Each pair has a common multicellular ancestor.29. Members of this phylum are photosynthetic, and have chloroplasts which are very much like those found in the higher plants. Some members are multicellular "seaweeds" and others are single celled.a. Rhizopodiab. Ciliophorac. Dynoflagellatad. Bacillariophyta e. ChlorophytaSI Bio 211 Practice Exam I Part II9.12.7 Mayfield30. Members of this phylum are photosynthetic, multicellular, and include the kelp, the largest of all the Protista.a. Bacillariophyta; b. Chlorophyta; c. Dynoflagellata; d. Phaeophyta; e. Rhodophyta31. What is unusual about the sexual process of Paramecium (a ciliate)?a. Both male and female gametophytes are formed.b. There are no gametes formed.c. The gametes are amoeboid.d. The zygote is haploid.e. The gametes are polyploid.32. During the life cycle of the malaria parasite, Plasmodium, where does the production of Merozoites occur?a. Human brain cellsb. Human Liver cellsc. Human red blood cellsd. Salivary gland of the mosquitoe. Blood of the mosquito33. What is characteristic of the diploid phase of the life cycle of the plasmodial slime mold (Physarum)?a. It is limited to a diploid zygote.b. A multicellular "slug" is formed from the aggregation of many diploid amoeboid cells.c. A body structure is formed which has many nuclei but only one plasma membrane.d. A multicellular gametophyte is formed.e. A multicellular spermatophyte is formed.34. During the life cycle of the green algae Chlamydomonas, zoospores are produced by what?a. meiosis c. gametophyte e. choices a and d are both correct.b. sporophyte d. mitosis35. Which of the following was not a problem when plants moved onto land?a. Loss of waterb. Ultraviolet lightc. Visible lightd. Gravitye. Fertilization (union of gametes)36. Which of the following best describes what we know about the Earth 600 million years ago?a. No plants on land except algae in wet places, no animals on land or in the sea.b. No plants on land except algae in wet places, no animals on land, but many primitive animals in the sea.c. Primitive plants on land, many seaweeds in the sea, no animals on land or in the sea.d. Primitive plants on land, many seaweeds in the sea, no animals on land, but many primitive animals in the sea.e. No plants on land except algae in wet places, primitive animals on land and in the sea.37. What problem encountered by the first land plants was partially solved by the use of a new kind of polysaccharide, lignin?a. Too much ultraviolet light.b. The plant was too heavy to stand up (gravity).c. Too much oxygen.d. How to acquire nutrients.e. The land environment was too dry.38. Which of the following is a general trend in the evolution of the plant kingdom?a. small plants to large plantsb. increasing dominance of the gametophyte stagec. diminution of the gametophyte staged. increasing efficiency of photosynthesise. increasingly complex seeds39. In all plants, what produces gametes?a. gametangia c. gametophyte e. choices a and c are correct, but b and d are not.b. meiosis d. sporophyte40. What do ferns have that mosses do not?a. A sporophyte generation.b. Motile sperm.c. Spores dispersed through the air.d. Structures called ovules e. A vascular system.SI Bio 211 Practice Exam I Part II9.12.7 MayfieldAnswer key1 d2 c3 b4 c5 b6 e7 e8 a9 e10 a11 c12 c13 c14 c15 c16 d17 a18 b19 c20 d21 e22 c23 a24 b25 e26 b27 e28 b29 e30 d31 b32 b33 c34 d35 c36 a37 b38 c39 e40
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