Chapter 7: Introduction To Biology - Biology For High School - Grade 9(Biology ) Questions and Answers

Question 1. Considering elements of nature, the elements that make 99% of the total mass present does not include
  1.    hydrogen
  2.    magnesium
  3.    nitrogen
  4.    oxygen
Explanation:-
Answer: Option B. -> magnesium
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 2. The changes in population occur due to change in
  1.    biotic factors
  2.    abiotic factors
  3.    environmental factors
  4.    none of above
Explanation:-
Answer: Option B. -> abiotic factors
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 3. Different organelles assemble to form a
  1.    cell
  2.    tissue
  3.    molecules
  4.    muscle
Explanation:-
Answer: Option A. -> cell
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 4. Each organelle has a specified
  1.    shape
  2.    function
  3.    size
  4.    mass
Explanation:-
Answer: Option B. -> function
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 5. The type of cellular organization in which many organisms do not undergo cellular division is called
  1.    unicellular
  2.    multicellular
  3.    colonial
  4.    groups
Explanation:-
Answer: Option C. -> colonial
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 6. The major groups in which organisms are divided does not include
  1.    protists
  2.    eukaryotes
  3.    prokaryotes
  4.    animals
Explanation:-
Answer: Option B. -> eukaryotes
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 7. Different organ systems combine together to form a complete
  1.    system
  2.    organism
  3.    organism
  4.    tissue
Explanation:-
Answer: Option A. -> system
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 8. Strength is provided to plants by tissues known as
  1.    parenchyma only
  2.    collenchyma only
  3.    ground tissues
  4.    parenchyma and collenchyma
Explanation:-
Answer: Option D. -> parenchyma and collenchyma
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 9. The example of biochemistry is
  1.    cost value of yield of crops
  2.    metabolism of photosynthesis
  3.    analysis of data
  4.    none of above
Explanation:-
Answer: Option B. -> metabolism of photosynthesis
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 10. The subatomic particle that orbits in energy levels are
  1.    neutrons
  2.    protons
  3.    electrons
  4.    neurons
Explanation:-
Answer: Option C. -> electrons
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
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