In Class 12 Boards there will be Case studies and Passage Based Questions will be asked, So practice these types of questions. Study Rate is always there to help you. Free PDF Download of CBSE Class 12 Biology Chapter 13 Organisms and Populations Case Study and Passage Based Questions with Answers were Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 12 Biology Case Study Questions Organisms and Populations to know their preparation level.
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In CBSE Class 12 Biology Paper, There will be a few questions based on case studies and passage-based as well. In that, a paragraph will be given, and then the MCQ questions based on it will be asked.
Organisms and Populations Case Study Questions With Answers
Here, we have provided case-based/passage-based questions for Class 12 Biology Chapter 13 Organisms and Populations
Case Study/Passage-Based Questions
Case Study 1:Organism P has thick lips and tongues so that it can easily feed on the commonly available spiny plants. Organism Q has a thick layer of insulating fat under the skin. It was strong hooves to walk steadily on steep surfaces and live in burrows during winters. Organism R has bright colors and sticky pads on its fingers and toes. It lives on trees.
Which of the following is the correct habitat for organisms P regarding its adaptation?
(a) Grassland biome (b) Desert biome
(c) Tropical rainforest
(d) Tropical deciduous forest
Answer: (b) Desert biome
Which of the following is the correct match regarding organism Q and its habitat?
(a) Tundra – Polar bear
(b) Tropical rain forest – Deer
(c) Grassland – Bighorn sheep
(d) Desert – Camel
Answer: (a) Tundra – Polar bear
Which of the following is incorrect regarding organisms R’s habitat?
(a) The vegetation shows stratification
(b) Epiphytic growth is rich
(c) Standing crop is highest
(d) Deep-rooted shrubs are common due to abundant sunlight
Answer: (d) Deep-rooted shrubs are common due to abundant sunlight
The dominant plants in a habitat where P lives could be
(a) Opuntia (b) Nymphaea
(c) Deodar (d) both (a) and (c)
Answer: (a) Opuntia
Organisms P, Q, and R respectively most likely occur in
(a) F, B and A (b) C, A, E
(c) A, F and C (d) B, D and A
Answer: (c) A, F and C
Case Study/Passage-Based Questions
Case Study 2: The growth of a population with time shows specific and predictable patterns. Two types of growth patterns of the population are exponential and logistic growth. When resources in the habitat are unlimited each species has the ability to realize fully its innate potential to grow in number. Then the population grows in an exponential fashion. When the resources are limited growth curve shows an initial slow rate and then it accelerates and finally slows giving the growth curve which is sigmoid.
Which of the following statement is incorrect?
(a) Exponential growth occurs in organisms such as lemmings.
(b) Logistic growth is more realistic.
(c) Exponential growth has two phases lag and log.
(d) In logistic growth, the population passes well beyond the carrying capacity of the ecosystem.
Answer: (d) In logistic growth, the population passes well beyond the carrying capacity of the ecosystem.
Which of the following equations correctly represents the exponential population growth curve?
Answer: (d) Both (a) and (c)
Which of the following equations correctly represents Verhulst-Pearl logistic growth?
Answer: (a)
The population growth is generally described by the following equation:
What does ‘r’ represent in the given equation?
(a) Population density at time ‘t’
(b) Intrinsic rate of natural increase
(c) Carrying capacity
(d) The base of the natural logarithm
Answer: (b) Intrinsic rate of natural increase
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