Science 9 Unit 1 Practice Test - KEY

Transcription

1 Science 9 Unit 1 Practice est - KEY I. Multiple Choice Choose the best answer. Julie is interested in becoming an evolutionary biologist. he following questions relate to some of the issues she will face in her new career. 1. Which of the following is the branch of science that deals with the study of heredity? A. biodiversity B. genetics C. variation D. ecology 2. Which of the following characteristics are examples of continuous variation? I) hair color II) fingerprint pattern III) height A. I and II B. II and III C. I and III D. I, II and III 3. Which of the following characteristics are examples of discrete variation? I) blood type II) gender III) skin color A. I and II B. II and III C. I and III D. I, II and III Ben is doing a lab at school where he is subjecting an onion to a chemical process as well as the physical of cutting and crushing the onion in an attempt to extract the onion s DNA. he following questions are based on his experience in the lab. 4. Ben is trying to extract DNA because he knows that it is a very important molecule for all living things. Which of the following is NO a reason why DNA is so important? A. it controls all of the functions of the cells in an organism B. it contains all the information necessary for reproduction C. it is responsible for variation within a species D. it is the only living part of a cell

2 5. Ben knows that the actual strands of DNA are far too small to be seen by the naked eye. He also knows that the DNA is contained within, which are found in the cell s nucleus. A. nucleotides B. chromosomes C. mitosis D. meiosis 6. In looking at the results of his lab under a microscope, Ben tries to find the different nitrogen bases that make up part of the DNA molecule. Which of the following is NO a nitrogen base found in DNA? A. cylasine B. adenine C. thymine D. guanine 7. While growing, the onion was damaged by wind. he onion repaired the damage through the process of A. mitosis B. regeneration C. meiosis D. fission 8. he color of the onion is determined by part of its DNA. A part of the DNA molecule that codes the formation for a specific protein is called A. a zygote B. a phosphate C. a nucleotide D. a gene 9. Some fish reproduce by fertilizing an egg with a sperm cell. Each sperm and egg is also called A. a zygote B. a gamete C. a chromosome D. an embryo 13. Which of the following techniques describes moving genetic information from the DNA of one cell into another? A. mitosis B. meiosis C. reproduction engineering D. genetic engineering 10. Larger organisms are used when scientists are genetically modifying an organism by inserting human genes into the fertilized eggs. What are these genetically modified organisms called? A. trans species B. transgenic C. transformic D. transgenetic 11. Biotechnology has had a great impact on many industries. Which of the following was one of the first medical uses of biotechnology? A. fish being bred with a gene to prevent freezing B. corn being developed to resist damage caused by herbicides C. domesticating dogs for pets D. bacteria producing human insulin

3 12. Each year a farmer collects seeds from the vines that produce the largest pumpkins, and uses only these seeds when he sows his next crop. Which of the following methods is he using in an effort to grow larger pumpkins? A. natural selection B. natural adaptation C. artificial selection D. artificial adaptation 13. Certain traits are passed onto the next generation and some are not. Which of the following is the name of the process without the interference of humans? A. artificial selection B. natural selection C. artificial breeding D. natural breeding Ian and Sophie were doing a field study of organisms and plants in a specific region of Banff National Park. hey collected data regarding organism populations and compared these data to those collected over the course of many years. he following questions are based on their study. 14. Which of the following does NO account for decreasing levels of biodiversity in other parts of the world? A. decreasing human populations in developing countries B. dependence on wood for fuel and paper products C. increased demand for consumer goods all over the world D. clearing land for farming II. rue or alse In the space provided, indicated whether each statement in true () or false (). 15. In the formation of sex cells, cell division occurs four times. 16. Polydactyly is a recessive trait. 17. Weight is determined by genetics and environment. 25. A human gamete has twice the number of chromosomes of a human body cell. 26. In general, blue eyes are dominant to brown eyes. 27. CIES is aimed at preventing endangered organisms from being imported or exported. 28.Grizzlies have lost their southern habitat due to human settlement. 29.Somatic cells reproduce using mitosis and form two new identical cells. 30. oday we are experiencing the largest decrease in biodiversity in the history of the world.

4 ill in the Blanks. Use the words below to complete each statement. Ovule Angiosperm Embryo Pistil Asexual Extirpation Bacterial Conjugation Binary ission Genetic Sexual Budding Heritable Spores Histogram Stamen Clone Strategy Cross ertilization Zygote 1. raits that are passed on from one generation to the next are said to be Hereditary 2. One bacterial cell transfers genetic material to another bacterial cell in the process called Bacterial Conjugation 3. An advantage of Sexual reproduction is that the offspring inherit a combination of traits from two parents. 4. A reproductive Strategy is a method an organism uses to reproduce. 5. An amoeba reproduces using the process of Binary ission to produce two daughter cells. 6. Some fungi reproduce asexually by forming Spores 7. Dolly the sheep is an example of a Clone 8. Sea sponges reproduce asexually by Budding 9. A Zygote is the new cell formed by the process of fertilization. 10. he female reproductive organ in an angiosperm is called the Pistil, and the male reproductive organ is called the Stamen 1. When one species evolves into two or more similar yet separate species over time, this process is called A. Variation B. Competition C. Specialization D. Speciation 2. What two things make up an organism s niche? A. Where it lives and its role. B. Where it lives and its food source. C. Its role and food source. D. Its water and food source. 3. Biological diversity is A. Physical characteristics of individuals within a species. B. he number and variety of organisms. C. Behavioral characteristics of individuals between species. D. Shared characteristics between most species. 5. Differences in characteristics of organisms caused by genetic and environmental factors are called: A. Adaptations B. Species C. Variations D. Mutations

5 6. Organisms that can interbreed and produce fertile offspring are from the same: A. Genus B. Species C. All of the above D. None of the above 7. Biological diversity is important for the following reason(s): A. Many medicines come from biological sources. B. he survival of one species is sometimes closely linked to the survival of another. C. Biological diversity may promote the health and survival of natural communities. D. All of the above. 8. Which kind of graph should be used to display the frequency of students height? A. Line graph B. Bar Graph C. Histogram D. Broken line graph 9. Which of the following is an example of a behavioural adaptation? A. A hummingbird migrating. B. A gecko using setae to walk on the underside of leaves. C. A plant trapping insects in its pitcher shaped leaves. D. Light weight bones that help a bird fly. 10. Areas with greater biological diversity A. Are more tolerant to changes in the environment B. Are less tolerant to changes in the environment C. Have a relatively low diversity index D. None of the above. 11. Which of the following is an example of variation within a species? A. Penguins cannot fly, but sparrows can. B. Birds lay eggs, while mammals give birth to live young. C. Whales and seals can both swim. D. A litter of kittens includes three black and one grey. 12. Which of the following best explains why tropical rain forests are thought to contain many undiscovered species? A. Many specialists live in rain forests, indicating the presence of even more specialists. B. Generalists are likely to be found in areas that have not yet been explored. C. Many areas have not yet been explored by scientists, and may contain specialist species not found elsewhere. D. Numbers indicate that it is a diverse area.

6 13. In a competition for resources, the less successful species may be required to A. Move to another habitat. B. Conserve a less desirable food source. C. Alter its behaviour. D. All of the above. 14. When organisms change their niche, A. hey no longer need to compete with a more dominant species. B. he variation within or between the species is increased. C. hey have moved to a new habitat. D. he degree of variation within the species is decreased. 15. Which of the following statements is not true? A. A specialist has a narrow niche. B. A generalist has a broad niche. C. A generalist has many different specializations. C. Several specialists can occupy the same area without competing. 16. Populations of these organisms tend to be high, although there is not usually very much diversity in the kinds of these organisms. A. Generalists. B. Specialists. C. Mutualists. D. Commensalists. 17. Rainforests have much greater diversity than the Canadian north. Why? A. Most Canadian species are generalists. B. he species that live in rainforests have a broader niche. C. Most Canadian species are specialists. D. he rainforests have more niches. 21. he differences in the beaks of the finches on the Galapagos Islands likely arose as a result of differences in the A. Species of birds on each island. B. emperatures on each island. C. Predators preying on the finches on each island. D. Sources of food available on each island.