9th Biology Chapter Solving Biological Problems MCQs

9th class Biology 2nd Chapter Solving Biological Problems MCQs Solved Exercise Notes

The students of Class 9, who are preparing for upcoming board examinations, should prepare themselves according to the past papers. 

According to the past papers, the exam paper will be divided into two sections. 

Section-01: MCQs Questions 

Sections-02: Long and Short Questions 

Today, we will share the 9th Biology Chapter Solving Biological Problems MCQs with answers. 

Here candidates will get the 9th class biology 2nd chapter "Solving Biological Problems" MCQs solved textbook exercise.

This will also help students in 9th class board exam mcqs, 10th class board exam mcqs, 11th class board exam mcqs, and 12th class board exam mcqs.

We have prepared most repeated MCQs from the 9th Class Biology past papers.

Therefore, this will help students in improving their grades in the board examinations.

9th Class Biology 2nd Chapter MCQs with Answers

After reading the 2nd Chapter of 9th Class Biology, We have selected some most important Multiple Choice Questions (MCQs) for our readers. 

These questions repeats in every exams. So, for the convenience of our students, we have solved all repeated MCQs from the 2nd Chapter of 9th Class Biology. 

These are the most repeated 9th class Biology MCQs of the 2nd Chapter "Solving Biological Problems" from the board exams.

9 class past papers Biology and 9 class Biology mcqs and textbook solved exercises will also be uploaded here.

Solving Biological Problems: 9th class Biology 2nd Chapter Solved MCQs with Answers.

01. Which of the following is correct sequence of biological methods:

(a) Theory→ Law → Reasoning → Hypothesis

(b) Law→ Theory → Hypothesis→ Reasoning

(c) Hypothesis → Reasoning → Theory → Law

(d) Theory→ Hypothesis → Reasoning → Law

Sol: (c) Hypothesis → Reasoning → Theory → Law

02. What is the name of the scientific method used to resolve biological problems?

a) Experimental method

b) Biological method

c) Hypothesis

d) None of the above

Sol: (b) Biological method.

03. Select the odd one:

(a) Theory

(b) Law

(c) Hypothesis

(d) Ratio

Sol: (d) Ratio

04. The frequently tested, never-rejected hypothesis is known as

a) Data

b) Theories

c) Deductions

d) Laws

Sol: (b) Theories

05. Who verified that a mosquito transmits plasmodium to a person?

a) Ronald Ross

b) A.F.A King

c) Laveran

d) All of the above

Sol: (a) Ronald Ross

06. There is a field of study called ________ that looks at mathematical models of biological systems. (a) Ratio (b) Mathematical biology (c) Proportion (d) Law

Sol: (b) Mathematical Biology

07. The bark of ____________ tree was the cure for malaria. A. Deodar B. Cendar C. Cinchona D. None

Sol. (C)

08. Names, dates, or values derived through observations and experiments are referred to as: a) Data analysis b) Data c) Principle d) Productive theory Sol: (b) Data.

09. Bark of quina - quina was imported from: A. Europe B. America C. Sapin D. India

Sol. (B)

10. All of them are involved in the biological methods, except for: (a) Data collection (b) Observation (c) Experiment (d) Proportion

Sol: (d) Proportion

11. What is the freezing point of water? a) 100℃ b) 98℃ c) 0℃

d) 105℃ Sol: (c) 0℃

12. The application of quantitative observation is _____. (a) Senses (b) Equipment (c) Guess (d) Ratio

Sol: (b) Equipment

13. Ross used _____ for their experiments? a) Sparrows b) Mosquito c) Rat d) All of the above Sol: (a) Sparrows

14. Who made the argument that mosquitoes contribute to the spread of malaria? A. Laveran B. Ronald Ross C. A.F.A king D. None of these

Sol. (C)

15. What would be the most effective experimental plan to test the claim that bean plants need sodium? A. Count the salt content of a few bean plants.

B. Analyze root contents for sodium C. Look for sodium in leaf tissues

D. Grow bean plants with and without sodium

Sol: (D)

16. Scientific Reasoning shifts from the particular to the general: (a) Inductive (b) Deductive (c) Observation (d) Both a and b

Sol: (a) Inductive

17. A big snake is spotted nearby by a gardener. He ran away since the gardener was aware that snakes typically sting. He _____. a) Used observation b) Used reasoning c) Conducted a theory d) Tested a hypothesis Sol: (b) Used reasoning

18. Biologists developed _____ using Reasoning. a) Results b) Experiments c) Theory d) Hypothesis Sol: (d) Hypothesis

19. What is the most likely time for a biological to employ reasoning? A. While taking observations B. During hypothesis formulation C. During data organization D. None of these

Sol. (B)

20. Which approach to data organisation is most effective? (a) Table (b) Graph (c) Ratio (d) Both a and b

Sol: (d)

21. In comparison to a litre of _____, a litre of water is heavier. a) Sodium b) Calcium c) Magnesium d) Ethanol Sol: (d) Ethanol.

22. What is the definition of a hypothesis? (a) The same thing as an unproven theory. (b) A tentative explanation that can be tested and is falsified. (c) A verifiable observation. (d) a fabricated reality that is supported by quantitative data

23. Plasmodium grows in the _____ of a human. a) Blood b) Skin c) Kidney d) Wall of stomach Sol: (a) Blood.

24. Which of the following is example of biological laws ______ a) Newton’s law of motion b) Hardy-Weinberg law and Mendel’s law c) Dalton’s law d) All of the above Sol: (b) Hardy-Weinberg law and Mendel’s law

25. What is the most basic step of the biological method? a) Observations b) Hypothesis c) Summarization of results d) Experimentation Sol: (d) Experimentation

26. Equation stating that two ratios are equal (a) Ratio (b) Proportion (c) Guess (d) Senses

Sol: (b) Proportion

27. When is it most likely for a biologist to utilise logic? a) While taking observation b) During hypothesis formulation c) During data organization d) None of the above Sol: (b) During hypothesis formulation

28. ____________ is believed to have died of malaria. A. Aristotle B. Alexander C. Laveran D. Genghis khan

Sol. (B) Alexander

29. The name of the computational and statistical method used to analyse biological data is _____. a) Productive theory b) Bioinformatics c) Data analysis d) All of the above Sol: (b) Bioinformatics.

30. A litre of ethanol weighs ______. a) 789 grams b) 786 kg c) 789 ml d) 789 mg Sol: (a) 789 grams.

Fill In The Blanks:

Here is the solved exercise of Sindh Textbook Board (STBB) 9th Class Biology 4th Chapter Blanks with Answers.

(i) Problem-solving approach of biology and other sciences called Scientific Method.

(ii) Solution of the biological problem starts with observation.

(iii) The key component of the scientific process is Hypothesis.

(iv) Scientific reasoning based on an “if-then” statement called deductive reasoning.

(v) Final step of the scientific method is developing a conclusion.

(vi) The uniform or constant fact of nature, virtually an irrefutable theory is scientific law.

(vii) Once you have the data, you may need to perform a mathematical analysis.

(viii) The equation stating that two ratios are equal is called proportion.

(ix) Ratio is the comparison of two values.

(x) The cause of malaria is Plasmodium.