In CBSE Class 10 Science Paper, Students will have to answer some questions based on Assertion and Reason. There will be a few questions based on case studies and passage-based as well. In that, a paragraph will be given.
Here we are providing you with Class 10 Science Chapter 6 Life Processes Case Study Questions, by practicing this Case Study and Passage Based Questions will help you in your Class 10th Board Exam.
Case Study Chapter 6 Life Processes
Here, we have provided case-based/passage-based questions for Class 10 Science Chapter 6 Life Processes
Case Study/Passage-Based Questions
Transpiration is the evaporative loss of water by plants. It occurs mainly through the stoma in the leaves. Besides the loss of water vapor in transpiration, the exchange of oxygen and carbon dioxide in the leaf also occurs through pores called stomata. Normally stomata remain open in the daytime and close during the night
(i) Which of the following will not directly affect transpiration?
|(a) Temperature||(b) Light|
|(c) Wind speed||(d) Chlorophyll content of leaves|
Answer: (d) Chlorophyll content of leaves
(ii) Water vapour comes out from the plant leaf through the stomatal opening. Through the same stomatal opening, carbon dioxide diffuses into the plant during photosynthesis. Reason out the above statements . using one of following options.
(a) The above processes happen only during night time.
(b) One process occurs during day time and the other at night.
(c) Both processes cannot happen Simultaneously.
(d) Both processes can happen together at day time.
Answer: (d) Both processes can happen together at day time.
(iii) Which of the following statements is not true for stomatal apparatus?
(a) Guard cells invariably possess chloroplasts and mitochondria.
(b) Guard cells are always surrounded by subsidiary cells.
(c) Stomata are involved in gaseous exchange.
(d) Inner wall of guard cells are thick.
Answer: (b) Guard cells are always surrounded by subsidiary cells.
(iv) Which of the following is not a purpose of transpiration?
(a) Helps in absorption and transport in plants
(b) Prevents loss of water
(c) Maintains shape and structure of plants by keeping the cells turgid
(d) Supplies water for photosynthesis
Answer: (b) Prevents loss of water
(v) Refer to the given graphs regarding factors affecting transpiration rate and select the correct option.
(a) P-Atmospheric temperature; Q-Atmospheric pressure
(b) P-Relative humidity; Q-Atmospheric temperature
(c) P-Air movement; Q-Light
(d) P-Atmospheric pressure; Q-Relative humidity
Answer: (a) P-Atmospheric temperature; Q-Atmospheric pressure
Heterotrophic nutrition is a mode of nutrition in which organisms obtain readymade organic food from outside sources. The organisms that depend upon outside sources for obtaining organic nutrients are called heterotrophs.
Heterotrophic nutrition is of three types: saprophytic, parasitic, and holozoic nutrition.
(i) In which of the following groups of organisms food material is broken outside the body and absorbed?
(a) Mushroom, green plants, Amoeba
(b) Yeast, mushroom, bread mould
(c) Paramecium, Amoeba, Cuscuta
(d) Cuscuta, lice, tapeworm
Answer: (b) Yeast, mushroom, bread mould
(ii) Which of the following is a parasite?
Answer: (b) Taenia
(iii) Which of the following is an example of saprotroph?
Answer: (b) Mushroom
(iv) Heterotrophic nutrition involves
(a) production of simple sugar from inorganic compounds
(b) utilisation of chemical energy to prepare food
(c) utilisation of energy obtained by plants
(d) all of these.
Answer: (c) utilisation of energy obtained by plants
(v) In Paramecium, food enters the body through
Answer: (d) cytostom
You can also practice Class 10 Science MCQ Questions for Board Exams.