Exam I_Bio242_2010 - Diversity of Life (BIO 242): Exam I...

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Diversity of Life (BIO 242): Exam I Student Name: Instructor: Dr. David Reed Student Signature: Date: February 1, 2010 There are 50 multiple choice questions on this exam. Each question is worth two points. Choose the best answer. 1 . Slime molds reproduce A) asexually. B) both asexually and sexually. C) by budding. D) using binary fission. E) vegetatively. 2 . An organism that obtains its energy from chemicals is a A) autotroph B) chemotroph C) heterotrophy D) phototroph E) autotroph and chemotroph 3 . The Irish potato famine was caused by an organism that belongs to which group? A) ciliates B) diatoms C) dinoflagellates D) oomycetes E) prokaryotes
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4 . Which of the following is true of the Pterophytes? A) Includes the ferns and are seedless plants. B) They have flagellated sperm but no roots. C) They have roots, a sporophyte-dominant life cycle, and the sporophyte is dependent on the gametophyte. D) They have vascular tissues and seeds. E) They possess fronds, rhizomes, and seeds. 5 . Not present in all bacteria, this cell covering enables cells that possess it to resist the defenses of host organisms A) cell wall B) capsule C) endospore D) flagellum E) sex pilus 6 . Which of these would, if acted upon a gene, prevent this gene from acting as a reliable molecular clock? A) Genetic drift B) Most substitutions involving the third codon position C) Mutations within introns D) Natural selection E) Neutral mutations
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7 . Which of the following is composed almost entirely of peptidoglycan in a gram-positive prokaryotic cell? A) Cell wall B) Cuticle C) Endospore D) Flagellum E) Sex pilus 8 . Which of the following traits do archaeans and bacteria share? A) Composition of the cell wall B) Composition of the cell wall and lack of a nuclear envelope C) Identical rRNA sequences and presence of membrane-bound organelles D) Lack of a nuclear envelope and lack of membrane-bound organelles E) Presence of a nuclear envelope 9 . The legless condition of all snakes and some lizards is the result of A) Individual Lizards adapting to a fossorial (living in underground burrows) lifestyle. B) Lizards are more evolutionarily advanced than snakes, but some have not grown legs yet. C) Several instances of the legless condition arising independently of each other. D) Their common ancestor was legless. 10. An organism is collected from the ocean. It has differentiated organs, cell walls of cellulose, and chloroplasts. The organism could be a brown, red, or green algae, a charophyte washed into the ocean from a freshwater source or a land plant washed into the ocean. The presence of which of the following features would definitively identify the organism as a land plant? A) Alternation of generations B) Embryos C) Flagellated sperm D) Rosette cellulose-synthesizing complexes E) Sporopollenin
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11 . The four chambered heart of birds and the four-chambered heart of mammals evolved independently of each other. The basal ancestor of the mammals is usually referred to as the mammal-like reptiles. Birds are much more recent evolutionarily and the crocodilians are the
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This note was uploaded on 01/31/2011 for the course BIO 242 taught by Professor Mr.johnson during the Spring '08 term at University of Louisville.

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Exam I_Bio242_2010 - Diversity of Life (BIO 242): Exam I...

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