Biology Answers and Study Guides

Circle of Life - Period 1B (2007-2008)

Answers: chapter 1 Assessment

Chapter 1 Assessment

 

  1. C
  2. A
  3. B
  4. C
  5. A
  6. B
  7. B
  8. D
  9. D
  10. A
  11.  The goal of science is to investigate and understand the natural world, to explain events in the natural world, and to use those explanations to make useful predictions.
  12. An observation uses senses to gather information; an inference is a logical interpretation based on prior knowledge and experience.
  13. Hypotheses help scientists by suggesting testable explanations for a set of observations. Hypotheses are starting points for discovering new information.
  14. A hypothesis may arise from prior knowledge; logical inferences; or informed, creative imagination.
  15. Scientists should test only one variable at a time so that only one observable factor affects the observed results of the experiment.
  16. A variable is a factor in an experiment that can change. A control is a factor in an experiment that is kept unchanged.
  17. Asking a question, forming a hypothesis, setting up a controlled experiment, and recording and analyzing results.
  18. Redi used jars, meat, and gauze. The gauze was important because he used it to cover some jars; the gauze was his manipulated variable.
  19. Whether microorganisms would grow in gravy that was boiled and then left in covered containers.
  20.  It must be well supported by observation and experimentation.
  21. Unicellular and multicellular organisms are alike in that they all share eight characteristics of living things. They are different in that unicellular organisms are one-celled and multicellular organisms have more than one cell.
  22. Example: During its life cycle a fly goes through there stages: egg -> larva -> pupa -> adult fly.
  23. External stimuli come from the environment outside an organism, whereas internal stimuli come from within an organism. Hunger and thirst are internal stimuli. Sights and sounds are external stimuli.
  24. A graph can make a pattern easier to recognize and understand.
  25. A cell culture is a group of cells produced when a single cell is placed in a nutrient solution and allowed to reproduce. Scientists can use cell cultures to test cell responses under controlled conditions, to study interactions between cells, and to select specific cells for future study.

 

Preparing for the FCAT

 

  1. A
  2. F
  3. C
  4. H
  5. B
  6. I