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Exam 1 Study Guide

by: Jaime Jackson

Exam 1 Study Guide BI 203-001

Jaime Jackson
GPA 3.71

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These notes have all the questions from the previous four chapters. They will most likely be on the test in some was so study them very well.
Radhika Reddy
Study Guide
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This 4 page Study Guide was uploaded by Jaime Jackson on Friday April 15, 2016. The Study Guide belongs to BI 203-001 at Portland State University taught by Radhika Reddy in Winter 2016. Since its upload, it has received 390 views. For similar materials see in Biology at Portland State University.


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Date Created: 04/15/16
Friday, April 15, y Study Guide Questions (may be on test) Chapter 13 ­ 1. A population is                        . A. a species and its interactions with its environment. B. the biotic and abiotic components of an ecosystem. C. an individual organism and its niche. D. a group of interbreeding individuals (species) that live in the same place at the same time and have the capacity to produce fertile offspring. 2.   How might different versions of the same gene (alleles) be expressed at the level of the  organism? A. As identical genotypes B. As different phenotypes  C. As identical traits D. As chromatin or a chromosome 3.   If q = 0.4, p = 0.6, and 2pq = 0.48 for a population, then the Hardy­Weinberg equation  must add up to ____. A. 1 B. 2 C. 3 D. 4 4. Suppose that 16% of a population exhibits a recessive phenotype. What does this 16%,  as a decimal, represent in the Hardy­Weinberg equation?  A. p2 B. 2pq C. q2 D. p 5. If q = 0.4 and p = 0.6 for a population, then 2pq = _____. A. 0.60 B. .240 C. .360 D. .48 6. In beta fish, a single tail is dominant and a double tail is recessive. In a population of 200  beta fish, 25 fish have a double tail. What is the recessive allele frequency? A. 12.5% B. 35% C. 50% D. 75% 1 Friday, April 15, y 7. How is evolutionary equilibrium maintained within a population? A. By mutations causing a change in DNA makeup B. By only a few mutations occurring, causing population members to differ from each  other C. By new alleles being produced that influence genetic traits D. By no occurrences of mutations taking place  within a population 8. Evolutionary change occurs in association with all of the following except _____. A. mutations B. gene flow C. small population size D. random mating ­ Chapter 14 1. Which of the following is a species? A. A group of interbreeding individuals that is reproductively isolated from other  groups B. A group of organisms and their interactions with the environment C. The biotic and abiotic components of an ecosystem D. An individual organism and its niche 2. On the basis of differences in DNA and structure, West African elephants are thought to  be a different species from Central, East, and South African savanna elephants and  Central African forest elephants. Which isolation mechanism has occurred? A. Geographical isolation B. Ecological isolation C. Temporal isolation D. Behavioral isolation 3. A female cricket does not understand the mating call of a male cricket. Which isolation  mechanism is occurring? A. Geographical isolation B. Ecological isolation C. Temporal isolation D. Behavioral isolation 4. Sea urchins spawn their gametes freely into the surrounding ocean waters. The sperm of  one type of urchin will not fertilize the egg of another type of urchin. Which isolation  mechanism is occurring? A. Geographical isolation B. Ecological isolation C. Temporal isolation D. Gametic incompatibility 2 Friday, April 15, y 5. A leopard frog and a wood frog mate and produce offspring, which die within a few  days. Which isolation mechanism has occurred? A. Geographical isolation B. Ecological isolation C. Hybrid inviability D. Hybrid infertility 6. Two populations of the columbine flower had lived at different altitudes in the same  area. When the two were reunited, they could no longer breed. Which isolation mechanism  has occurred? A. Geographical isolation B. Ecological isolation C. Temporal isolation D. Behavioral isolation ­ Chapter 15 1. What were the first organisms? A. Prokaryotes B. Eukaryotes C. Plants D. Animal 2. Which of the following is the correct order of the evolution/appearance of the  organisms/processes? A. Prokaryotic cells, eukaryotic cells, photosynthesis, multicellular organisms, animals,  land plants B. Prokaryotic cells, photosynthesis, eukaryotic cells, multicellular organisms, animals,  land  plants 3. What is the evolutionary significance of photosynthesis? A. Increased atmospheric water allowed for the evolution of complex organisms. B. Increased atmospheric hydrogen sulfide allowed for the evolution of complex  organisms. C. Increased atmospheric carbon dioxide allowed for the evolution of complex  organisms. D. Increased atmospheric oxygen allowed for the evolution of complex organisms. 4. Which of the following is an advantage of living on land?  A. Less animal life, making it easier to avoid predators B. A faster rate of photosynthesis C. Access to more nutrients D. All of the above 3 Friday, April 15, y 5. Which adaptations allowed plants to succeed on land? A. Structures to protect sperm and eggs B. Waxy waterproof coatings C. Development of roots D. All of the above 6. Which of the following allowed for the adaptive radiation of mammals? A. The transition from nocturnal to diurnal (daytime) activity  B. The development of feathers C. The extinction of the dinosaurs D. The change from a fast metabolism to a slow metabolism 7. The evolutionary history of a group of organisms is called ____________. A. phylogeny B. parsimony C. taxonomy ­ Chapter 16 1. By far the most abundant and widespread organisms on Earth are the  ___________________. A. protists B. protozoans C. eukaryotes D. prokaryotes 2. Bacterial ____________ are at work in the slimy feel of an underwater rock, ear  infections, and dental plaque. A. reproductive behaviors B. endospores C. biofilms D. cell walls 3. The primary difference between prokaryotes and protista is that protista have  _____________. A. endospores B. cilia C. membrane­enclosed organelles D. cell walls 4. All prokaryotic and eukaryotic organisms that photosynthesize fit into which nutritional  category? A. photoheterotrophs B. autotrophs C. Mixotrophs D. chemoheterotrophs 4


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