9th class Biology
Chapter 2
Solving a Biological Problem
Exercise solved Mcqs
1. Which one of the
following is a correct sequence in biological method?
a) Observation,
Hypothesis, Law, Theory
b) Hypothesis,
Observation, Deduction, Experimentation
c) Observation,
Hypothesis, Deduction, Experimentation
d) Law, Theory,
Deduction, Observation,
2. Which one of
these is NOT a characteristics of a hypothesis?
a) Must be
consistent with all available data
b) Must be testable
c) Must
be correct
d) Must be
prediction
3. At which point
is a biological most likely to use reasoning?
a) While taking
observation
b) During
hypothesis formulation
c) During data
organization
d) None of the
above
4. A hypothesis
must be testable to be scientifically valid. Being testable means that
____________.
a) Some observation
could prove the hypothesis incorrect
b) Only a
controlled experiment can indicate whether the hypothesis is correct or
incorrect
c) The hypothesis
proven wrong
d) The
opposite of hypothesis is tested and proven wrong
5. What would be
the best experimental design for testing a hypothesis that bean plans required
sodium?
a) Measure the
amount of sodium in a few bean plants
b) Grow bean plants
with and without sodium
c) Look for sodium
in leaf tissues
d) Analyzed
root contents for sodium
6. A gardener sees
a large snake nearby. He knows that generally snakes sting so the gardener ran
away. The gardener did which of the following
a) Used
reasoning
b) Used observation
c) Contracted a
theory
d) Tested a
hypothesis
7. A scientific
theory has which of the following properties?
a) It agrees with
available evidence
b) It
can not be rejected
c) It has been
absolutely proven
d) It dose not need
to be altered in the light of new
evidence
8. Experimentation
is only a step of the scientific process, but it is very important because it
always _____.
a) Gives the
biologist a correct result
b) Allows
rejection of some alternative hypotheses
c) Ensure that
hypotheses can be confirmed with certainty
d) Gives scientist
a chance to work in the laboratory
9. You are testing
a hypothesis; “ Students learn more if they drink tae before sitting for
study”. Your 20 experimental students drink tea before study; you test their
learning by giving questions. Your 20 students of the control group should have
all experimental conditions identical to the experimental group EXCEPT that;
a) They should take
tea with more milk and sugar
b) They
should take tea before as well as during study
c) They should not
take tea before study
d) After taking
tea, they should not sit for study
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