Life Science A Review

1. Life Science A Review

2. Welcome to the Review

3. Contents • Scientific Method • Classification • Cell structure • Cell Process • Evolution

4. Scientific Method

5. Explaining or interpreting the things you observe based on reasoning from what you already know is called • A. observing. • B. inferring. • C. predicting. • D. classifying.

6. The factor which may change in response to the manipulated variable is the • A. operational definition. • B. responding variable. • C. variable. • D. particular variable.

7. Which is a scientific question? • A.Why did the chicken cross the road? • B.Why does one kind of apple taste better than another? • C.At what temperature does CO2 freeze? • D.Why does Susan like math more than Steve does?

8. Using one or more of your senses to gather information is called • A. observing. • B. inferring. • C. predicting. • D. classifying.

9. Which of the following is a valid reason why a scientist might reject a scientific theory? A. Some people disagree with it. B. It cover too broad a topic. C. New evidence contradicts it. D. It is too old.

10. When scientists create a representation of a complex process, they are • A. inferring. • B. predicting. • C. making models. • D. classifying.

11. Observations that deal with numbers or amount are called • A. operational observations. • B. manipulated observations. • C. quantitative observations. • D. qualitative observations.

12. Which of the following is an example of thinking scientifically about a topic? A. finding out how bicycles work. B. reading a consumer report about bicycles. C. evaluating the cost of bicycles. D. investigating the invention of bicycles.

13. A possible explanation for a set of observations or answer to a scientific question is called a(n) A. prediction. B. hypothesis. C. theory. D. law.

14. During an experiment, which factors must be controlled so that researchers can draw a logical conclusion from the experiment? A. variables. B. operational definitions C. inquiries D. theories

15. An organized way to collect and record scientific observations is with a(n) A. model. B. inference. C. data table. D. operational definition.

16. A well-tested explanation for a wide range of observations or experimental results is called a scientific A. inquiry. B. hypothesis. C. theory. D. law.

17. A summary of what you have learned from a scientific experiment is called a(n) A. hypothesis. B. inquiry. C. conclusion. D. law.

18. Trying to explain how plant roots absorb minerals is an example of • A. classification. • B. scientific inquiry. • C. drawing a conclusion. • D. a prediction.

19. Scientists can communicate their results • A. at scientific meetings. • B. in scientific journals. • C. by exchanging information on the internet. • D. all of the above.

20. Scientists’ skepticism should be balanced with an ability to • A. accept new and different ideas. • B. be honest. • C. find solutions to problems. • D. learn more about the topics they study.

21. To reveal trends in data, the data should be presented in a(n) • A. hypothesis. • B. graph. • C. operational definition. • D. scientific investigation.

22. Graph

23. Observations that deal with descriptions that cannot be expressed in numbers are called • A. manipulated observations. • B. quantitative observations. • C. qualitative observations. • D. operational observations.

24. Classification

25. When scientists put things into categories or group together items that are alike in some way, they are • A. inferring. • B. predicting. • C. making models. • D. classifying.

26. The scientific name of a bobcat is • A.felisrufus. • B.Felisrufus. • C.Felis Rufus. • D.felis Rufus.

27. The wolf, Canis lupus, is most closely related to • A.Ursusarctos. • B.Felissylvestris. • C.Canisfamiliaris. • D.Felispardus.

28. Cell Structure

29. To distinguish fine detail, the microscope needs good • A. magnification. • B. eye pieces. • C. resolution. • D. photons.

30. Some of the characteristics living things share are • A. cellular organization and use of energy. • B. structures using inorganic compounds. • C. absence of water in cells. • D. fermentation as principal source of energy.

31. Cells in many-celled organisms • A. all look the same. • B. all have the same structure. • C. are often quite different from each other. • D. are the same size in every part of the organism.

32. The control center of the cell is the • A.mitochondrion. • B.ribosome. • C.nucleus. • D.chloroplast

33. Which of the following statements is NOT part of the cell theory? • A.Cells are the basic unit of structure and function in living things. • B.All cells are produced from other cells. • C.Only animals are composed of cells. • D.All living things are composed of cells.

34. The structure of each cell is suited to its • A. size. • B. organism. • C. length. • D. function.

35. Lenses magnify an image of a small object by • A. taking a picture. • B. blocking the light. • C. bending the light. • D. making the object larger.

36. Which of the following statements is part of the cell theory? • A. Only plants are made of cells. • B. All cells are produced from other cells. • C. Cells can be produced from nonliving matter. • D. Cells are one of several basic units of structure and function in living things.

37. Specialized cells are found only in • A. animals. • B. single-celled organisms. • C. bacteria. • D. many-celled organisms.

38. The function of the cell wall is to • A. protect and support the cell. • B. perform different functions in each cell. • C. prevent water from passing through it. • D. prevent oxygen from entering the cell.

39. The function of a cell membrane is to • A.support the cell. • B.control what enters and leaves the cell. • C.perform different functions in each cell. • D.form a hard outer covering for each cell.

40. Which of the following is NOT a characteristic that all living things share? • A. A cellular organization • B. Using energy. • C. Movement. • D. Reproduction.

41. Cell Processes

42. Autotrophs use the energy from the sun • A. evenly. • B. indirectly. • C. directly. • D. with oxygen.

43. How are respiration and photosynthesis related? • A. They have opposite equations. • B. They both produce carbon dioxide. • C. They have the same equation. • D. They both produce oxygen.

44. The arrow in a chemical equation is read as the word • A. equals. • B. yields. • C. turns. • D. equates.

45. Respiration and photosynthesis keep the levels of carbon dioxide and oxygen • A. constantly decreasing. • B. constantly increasing. • C. constantly changing. • D. fairly constant.

46. During photosynthesis, energy from sunlight is captured by • A. stomata. • B. chlorophyll and other pigments. • C. solar cells. • D. carbohydrates.

47. During photosynthesis • A. cells use oxygen to make food. • B. cells use glucose to make oxygen. • C. cells use the energy in sunlight to make food. • D. cells use the energy in sunlight to make carbon dioxide.

48. The Products of Photosynthesis are • A. green stems and leaves • B. carbon dioxide and sugars • C. oxygen and water • D. oxygen and sugars

49. The process by which small molecules enter the cell membrane is • A. engulfing. • B. swallowing. • C. active transport. • D. diffusion.

50. The source of energy for most autotrophs is • A. water. • B. the sun. • C. heterotrophs. • D. other autotrophs.