Science in the News Quiz.Directions: Read the late-breaking science news stories in our Science News section on pages 4-6. Then, test your knowledge by answering the questions below. Circle the correct letter. 1. The Human Genome The human genome is the genome of Homo sapiens, which is composed of 24 distinct pairs of chromosomes (22 autosomal + X + Y) with a total of approximately 3 billion DNA base pairs containing an estimated 20,000–25,000 genes. Project aims to a. map each gene in the human body. b. help scientists clone body parts. c. determine the function of each human gene. d. a and c 2. In each cell, DNA DNA: see nucleic acid. DNA or deoxyribonucleic acid One of two types of nucleic acid (the other is RNA); a complex organic compound found in all living cells and many viruses. It is the chemical substance of genes. consists of two spiral strands that stretch a. 3 meters long. b. 1.5 meters long. c. 10 meters long. d. 2 meters long. 3. The four chemical bases in DNA are a. A, B, C, D b. Q, R, S,T c. A, T, G, C d. W, X, Y, Z 5. What do scientists think created the Woodleigh crater Woodleigh is a large meteorite crater in Western Australia, centered on Woodleigh Station east of Shark Bay. A team of four scientists at the Geological Survey of Western Australia and the Australian National University, led by Arthur J. ? a. Fossilized fos·sil·ize v. fos·sil·ized, fos·sil·iz·ing, fos·sil·iz·es v.tr. 1. To convert into a fossil. 2. To make outmoded or inflexible with time; antiquate. v.intr. fish b. Asteroid asteroid, planetoid, or minor planet, small body orbiting the sun. More than 10,000 asteroids have orbits sufficiently well known to have been cataloged and named; thousands more exist. c. Dinosaurs d. Humans with shovels 5. The crater impact may have caused the a. end of the Ice Age. b. creation of aquatic mammals. c. drifting of continental plates. d. biggest mass extinction on Earth. 6. What makes today's roller coasters so speedy? a. Greased rails b. Electromagnets c. Lighter synthetic fiber on passengers' clothing d. The rides are shorter. 7. Flex-Foot is a a. shock-absorbing ballet shoe. b. high-tech prosthesis prosthesis (prŏs`thĭsĭs): see artificial limb. prosthesis Artificial substitute for a missing part of the body, usually an arm or leg. . c. foot exercise machine. d. gel-based foot pad to make you appear taller. 8. Thescelosaurus's fossilized heart tells scientists the dinosaur may have been a. a good swimmer. b. cold-blooded. c. a meat-eater. d. warm-blooded. 9. A four-chambered heart is a feature usually associated with a. mammals. b. reptiles. c. fish. d. insects. 10. Invertebrates are animals a. without backbones. b. that can turn inside out. c. that hang upside down. d. with backbones. ANSWERS Science in the News Quiz 1. d 2. b 3. c 4. b 5. d 6. b 7. b 8. d 9. a 10. a |
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