Ethiopian Grade 11 Unit 1: The science of biology Question Answers. The Ethiopian Grade 11 Biology textbook is divided into five units. Here we shall discuss Grade 11 Unit 1: The science of biology question answers which covers The methods of science, The tools of a biologist, The relevance and promise of biological science and Biology and HIV/AIDS.
Grade 11 Unit 1: The Science of Biology
1. What is Biology?
- A) Deals with the form and properties of matter and substances.
- B) Science of life and living organisms.
- C) Deals with Solar System and Universe.
- D) Deals with the nature and properties of matter and energy.
Answers: B. Biology is the science of life and living organisms. bios – meaning ‘life’ and logos – meaning ‘study.
2. Which statement is true regarding biologists?
- A) All Biologists don’t look down microscopes in laboratories.
- B) Some Biologists become astrobiologists.
- C) Biologists take part in biomedical research.
- D) Biologists help in the development of new drugs and vaccines.
- E) All of them
Answers: A. All of them are true.
3. Paleobiology is a study of _________
- A) The biology of fossil animals and plants.
- B) Human immuno-deficiency virus (HIV)
- C) Deals with Human Genome.
- D) None of these.
Answers: B ) Paleobiologists use evidence from fossils and from studies of the chemistry of ancient rocks to make estimates of when and how new life forms appeared on the planet.
4. How many chromosomes have been found in a humans cell?
- A) 26
- B) 46
- C) 58
- D) 68
Answers: B )This enormous project has produced the first-ever map of the 46 chromosomes found in human cells.
5. Gregor Mendel Was a ______?
- A) physiotherapists
- B) botanists
- C) zoologists
- D) Monk
Answers: D) First Gregor Mendel was a monk and so not obviously ‘a scientist’.
6. What is Gregor Mendel known for?
- A) Father of modern genetics
- B) Father of inheritance.
- C) Father of Gene.
- D) All of the above
Answers: A) Gregor Mendel, known as the “father of modern genetics,” was born in Austria in 1822. He discovered the basic laws of how genes are inherited.
7. Applied science is a study of_________?
- A) the process by which scientists approach their work
- B) experimental science the use of experiments to obtain information
- C) the use of scientific research to meet certain human needs
- D) All of the above
Answers: C)
8. What is spontaneous generation?
- A) the appearance of living organisms from non-living matter.
- B) the appearance of non-living organisms from living matter.
- C) the appearance of living organisms from living matter.
- D) All of the above
Answers: A) Spontaneous generation refers to an obsolete body of thought on the ordinary formation of living organisms without descent from similar organisms
9. IV stands for_____
- A) Independent Variable
- B) Intra Variable
- C) Interdependent Variable
- D) Inside Variable
Answers: A) Independent Variable: The factor that the scientist changes, or manipulates, is called the independent variable (or IV for short).
10. DV stands for_____
- A) Dependent Variable
- B) Dependency Variable
- C) Depend Variable
- D) Depending Variable
Answers A: The factor that the scientist measures to see if it changes when the IV is changed is called the dependent variable (or DV for short).
11. if you measure the carbon dioxide uptake by wheat plants as the light intensity changes over the day, you cannot control the effect of change in temperature. It could be a___
- A) Dependent Variable
- B) Independent Variable
- C) Controlled variables.
- D) Confounding variable Variable
Answers D: confounding variable a factor that can’t be controlled which may influence the result of the experiment
12. Which of these best describes what science is?
- A) a body of knowledge
- B) a way of doing experiments
- C) a way of looking at and thinking about the natural world
- D) a series of ideas
Answers: A) a body of knowledge
13. The scientific method involves:
- A) putting forward hypotheses in a form that can be tested
- B) carrying out experiments
- C) analysing results and drawing conclusions
- D) all of these
Answers: A) all of these.
14. Which of the following is NOT a type of biologist?
- A) geneticist
- B) entomologist
- C) astrophysicist
- D) doctor
Answers: C: Astrophysics is a branch of space science that applies the laws of physics and chemistry.
15. Scientists often use statistics when drawing conclusions because:
- A) statistics are more accurate than human opinion
- B) statistics are more reliable than human opinion
- C) statistics are infallible
- D) None of these
Answers: D) conclusions are read by other scientists working in the same field who can repeat the research and comment on any conclusions that have been drawn.
16. The independent variable in an experiment is the variable that:
- A) is measured by the experimenter
- B) is controlled by the experimenter
- C) is changed (manipulated) by the experimenter
- D) upsets the reliability of the results
Answers: C
17. The dependent variable in an experiment is the variable that:
- A) is measured by the experimenter
- B) is controlled by the experimenter
- C) is changed (manipulated) by the experimenter
- D) upsets the reliability of the results
Answers: A
18. Having a control condition in an investigation:
- A) gives a ‘standard’ to compare against
- B) increases the validity of the experiment
- C) increases the reliability of the experiment
- D) both A and B
Answers: A) gives a ‘standard’ to compare against
19. Publishing reports of biological investigations in scientific journals is important because:
- A) it allows biologists all over the world to understand your reports
- B) it allows biologists all over the world to repeat your investigations
- C) it allows biologists all over the world to challenge your results
- D) all of the above
Answers: D) all of the above
20. The scientific method is more reliable than opinion based on personal observation because:
- A) scientists are more reliable than other people
- B) the scientific method involves gathering information from controlled experiments to prove or disprove a hypothesis
- C) observation is not a valid scientific technique
- D) scientific method always gives the correct answer
21. The reliability of an experiment is increased by:
- A) carrying out repeat experiments
- B) minimising personal judgement
- C) working as quickly as possible
- D) using the most appropriate apparatus
Answers: A) carrying out repeat experiments
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