<p> Skills Worksheet Concept Review</p><p>MATCHING In the space provided, write the letter of the term or phrase that best matches the description. 1. an individual living thing a. ecosystem b. population 2. a group of various species that live in the c. natural selection same place and interact with each other d. organism 3. living or once living part of an ecosystem e. resistance 4. unequal survival and reproduction that f. abiotic factor results from the presence or absence of g. evolution particular traits h. species 5. all the organisms living in an area and i. community their physical environment j. biotic factor 6. change in the genetic characteristics of a population from one generation to the next 7. all the members of the same species that live in the same place at the same time</p><p>8. nonliving part of an ecosystem 9. ability of one or more organisms to tolerate a particular chemical designed to kill it</p><p>10. group of organisms that are closely related and that can mate to produce fertile offspring</p><p>MULTIPLE CHOICE In the space provided, write the letter of the term or phrase that best completes each statement or best answers each question.</p><p>11. What kind of habitat does a red backed salamander need to survive? a. damp forest floor b. sunny top of a tree c. dry forest floor d. sunny desert rock Concept Review continued</p><p>12. Which of the following king- 17. One way that bacteria and doms include organisms that fungi are important to the can make their own food? environment is that they a. protists and plants a. produce oxygen. b. plants and animals b. use the sun’s energy to c. fungi and plants make their own food. d. fungi and protists c. are a major food source in many ecosystems. 13. The Chihuahua is a dog that d. break down dead exists because of organisms. a. natural selection. b. artificial selection. 18. Phytoplankton are important c. resistance. protists because they are the d. abiotic factors. initial source of 14. Humans have promoted the a. food in most land evolution of insects that are ecosystems. resistant to insecticides by b. food in most ocean and a. trying to control pests freshwater ecosystems. with chemicals. c. oxygen in the atmosphere. b. using insecticides that are d. Both (a) and (b) outdated. c. using the wrong 19. Many angiosperms depend insecticide. on d. breeding more useful a. other animals in the insects. oceans. b. gymnosperms for 15. Which of the following is not reproducing. true of an adaptation? c. plants for food. a. It is an advantage to an d. animals to carry pollen organism in certain and disperse seeds. environments. b. It increases an organism’s 20. Which of the following char- chance of reproducing. acteristics is shared by bac- c. It increases an organism’s teria, fungi, and plants? chance of survival. a. They usually have cell d. It decreases an organ- walls. ism’s chance of evolving. b. They have cell nuclei. c. They are single celled. d. ______16. Which of the following is They have the ability to not one of the kingdoms of make their own food. living things? a. archaebacteria b. protobacteria c. eubacteria d. protists TEACHER RESOURCE PAGE Answer Key Concept Review of rabbits has proportionately more organisms with advantageous traits. MATCHING 1. d 6. g AGREE OR DISAGREE 2. i 7. b 14. Disagree; although they have very dif- 3. j 8. f ferent characteristics, both dog breeds 4. c 9. e are a result of thousands of years of 5. a 10. h artificial selection. Humans bred the ancestors of today’s wolves to produce MULTIPLE CHOICE the variety of dogs we have today. 11. a 16. b Wolves and different kinds of dogs are 12. a 17. d closely related. 13. b 18. b 15. Disagree; antibiotics may kill many 14. a 19. d bacteria, but the bacteria that remain 15. d 20. a are more resistant to the antibiotics. This use of antibiotics promotes the Critical Thinking evolution of resistant populations of ANALOGIES bacteria. Over a period of time, dis- 1. a 6. c eases can’t be controlled as effectively 2. c 7. b with the same antibiotics. This makes 3. b 8. d diseases harder to treat and more peo- 4. a 9. c ple may get them. 5. d 10. b 16. Disagree; by definition, a population is made up of all the members of the INTERPRETING OBSERVATIONS same species that live in the same 11. The hawks would see the dark gray place at the same time. A community rabbits more easily than the white is made up of all the populations in rabbits when snow was on the ground the same place at the same time. If because the white rabbits would organisms are members of the same blend in. Therefore, the hawks proba- species and live in the same commu- bly ate more gray rabbits than white nity, they all are part of the same rabbits. More white rabbits lived to population. reproduce. 12. During most months the remaining REFINING CONCEPTS dark gray rabbits would blend in with 17. Insects are difficult to control because the surroundings better than white they are small and can get into a home rabbits would. Hawks would eat easily, they don’t need much food to fewer dark rabbits than white rabbits. survive, they move quickly and can The rabbit population would change hide in small spaces easily, they repro- to include more gray rabbits because duce quickly, and they can become they would more likely survive to resistant to insecticides. reproduce. 18. No; all ecosystems are intercon- 13. More rabbits are born than can sur- nected. Answers may vary. Sample vive. The rabbits in a population dif- answer: Humans in the city rely on fer in the traits that they have. Some resources, such as water and food, of these traits give rabbits advantages from other ecosystems. Anything that help them survive. Rabbits can that affects water, air, land, or living then reproduce and pass these traits things can affect the city’s food and on to their offspring. Each generation water supply. Also, air in the city comes from other ecosystems. A</p>