Class 9th Biology Chapter 2


Total Marks: 21

1. A systematic knowledge derived from observation and experments is :
Biology science Biotechnology Molecular science
2. What type of reasoning is used to forrmulate a hypothesis ?
Deductive reasoning inductive reasoning tentative reasoning all above
3. Through experiments biologists learn what is correct about :
Theory Data reporting Reporting results Summary of results
4. Biologists gathers actual quantitaive data from
observations experiments deductions analysis
5. Who found plasmodium multipled in the wall of mosquitoes stomach ?
larveran AFA king ronald ross darwin
6. Biological method has been playing an important role for the last
200 years 500 years 600 years 400 years
7. The biological method comprises of ------ steps?
5 2 1 7
8. It should be a general statement \"belongs to \"
Experiment theory hypothesis Deduction
9. Which one of the following is not the characteristic of a good hypothesis
Must be consistent with all available data Must be tested Must be correct all above
10. Scientists collect and organize data to formulate and test ?
theory hypothesis deduction none of these
11. Which is means of summarizing data through calculation of a mean value ?
mathematics data analysis statistics statistics of datab
12. Proportion means to join two equal ratio by the sign of
= dived + -
13. What would be the best experimental design for testing a hypothesis that bean plants require sodium?
Measure the amount of sodium in some bean plants Grow bean plant with and without sodium Look for sodium in leaf tissues Analyze root content for sodium
14. A hypothesis must be testable to be scientifically valid. Being testable means that:
Some observation could prove the hypothesis incorrect Only a controlled experiment can indicate whether the hypothesis is correct or incorrect The hypothesis is proven wrong The opposite of hypothesis is tested and proven wrong
15. At which point is a biologist most likely to use reasoning
While taking observations During hypothesis formulation During data organization None of these
16. Which one of the following is not the characteristics of a good hypothesis:
Must be consistent with all available data Must be testable Must be correct Must make predictions
17. Experimentation is only a step of the scientific process, but it is very important because it always:
Gives the biologist a correct result Allows rejection of some alternative hypothesis Ensures that hypothesis can be confirmed with certainty Gives scientist a chance to work in the laboratory
18. Which of the following is a correct sequence in biological method?
Observations, hypothesis,deductions, experimentation Hypothesis, observations, law, theory hypothesis, observation, deductions, experimentation Law, theory, deductions, observation
19. At which point is a biologist most likely to use reasoning
While taking observations During hyphothesis formulation During data organization none of these
20. A gardener sees a large snake nearby. He knows that generally snakes sting, so he ran away.The gardener did which of the following?
Used reasoning Used observation Constructed a theory Tested a hypothesis
21. A scientific theory has which of the following properties?
It agrees with available evidence It cannot be rejected It has been absolutely proven It does not need to be altered in the light of new evidence