Living Creatures: Exploring their Characteristics — Hard

Q1. Assertion (A): The absence of any of the eight characteristics in an object indicates that it is non-living. Reason (R): All living beings show movement, nutrition, growth, respiration, excretion, response to stimuli, reproduction and eventually die.

• A. Both A and R are true, and R is the correct explanation of A.
• B. Both A and R are true, but R is NOT the correct explanation of A.
• C. A is true, R is false.
• D. A is false, R is true.

Q2. Consider the following statements that compare a car with yourself: I. A car moves on its own and so it is living. II. A car does not grow in size while you do. III. Comparison with yourself is one chapter-suggested way to decide whether a thing is living. Which statements are correct?

• A. I and II only
• B. II and III only
• C. I and III only
• D. All three

Q3. Charu argues that plants are non-living because they do not move from one place to another. Using the chapter, which observation best refutes her claim?

• A. Plants are tied to the soil by their roots
• B. Plants are usually green in colour
• C. The opening of flowers and the trapping action in Drosera show that plants do show certain types of movement
• D. Plants can be cut and moved by humans

Q4. Assertion (A): Breathing and respiration mean exactly the same thing. Reason (R): In the chapter, breathing is described as a part of the larger process of respiration.

• A. Both A and R are true, and R is the correct explanation of A.
• B. Both A and R are true, but R is NOT the correct explanation of A.
• C. A is true, R is false.
• D. A is false, R is true.

Q5. A Class 6 student records the number of breaths she takes per minute — first after a normal walk, then after a run, then after a few dance steps. What pattern is the chapter's activity designed to make her notice?

• A. The number of breaths stays the same in every situation
• B. The number of breaths is highest after the normal walk
• C. The number of breaths increases with the intensity of activity
• D. The number of breaths decreases as activity becomes harder

Q6. Consider the following statements about white patches on shirts around the armpits in summer: I. The patches are formed due to sweat. II. Sweat consists of water and salts removed by the body as waste products. III. The patches are an example of plant excretion. Which statements are correct?

• A. I and II only
• B. II and III only
• C. I and III only
• D. All three

Q7. Consider the following pairs of stimulus and response from the chapter: I. Stepping on a thorn — pulling the foot back instantly II. Touching a hot cup of tea — pulling the hand away III. A pencil falling on the floor — the pencil rolling away Which pairs are valid examples of stimulus and response in a living being?

• A. I and II only
• B. II and III only
• C. I and III only
• D. All three

Q8. After sunset, the leaves of an amla (Indian gooseberry) tree facing each other tend to come together. Based on the chapter, the most likely stimulus responsible for this behaviour is

• A. Increase in soil moisture
• B. Increase in noise around the tree
• C. Change in light around sunset
• D. Increase in the weight of leaves

Q9. After Activity 10.2, the class is asked, 'In which category would you place a seed — living or non-living?' Based on the chapter, the best-supported answer is

• A. Non-living, because a seed does not move on its own
• B. Living, because a seed under right conditions germinates, grows and produces a new plant
• C. Non-living, because the seed has a hard outer coat
• D. Living only when it is wet, otherwise non-living

Q10. In Activity 10.2, Pot C is kept in complete dark with moist soil. After 7–10 days, the expected observation is that the bean seeds in Pot C

• A. Do not germinate because light is absent
• B. Germinate, because both air and the right amount of water are available
• C. Do not germinate because moist soil blocks air completely
• D. Germinate only after Pot C is moved to sunlight

Q11. Coleus and Petunia seeds need light to germinate, while bean seeds do not. From the chapter's standpoint, the best general conclusion is that

• A. Light is essential for all seeds to germinate
• B. Light is essential for no seed to germinate
• C. Most seeds do not require light, but some flowering plants like Coleus and Petunia do
• D. Light only helps after germination is complete

Q12. In beaker B of Activity 10.3, a seedling is fixed in an inverted position with the shoot pointing downward and the root pointing upward, in sunlight from all directions. After a few days, the chapter's expected observation is

• A. Both shoot and root continue to grow in their original direction
• B. The shoot bends and grows upward; the root bends and grows downward
• C. The root grows in the direction of the light, and the shoot grows downward
• D. Both shoot and root stop growing

Q13. Consider the following conclusions drawn from Activity 10.3: I. Shoots of plants grow upward and exhibit movement towards sunlight. II. Roots of plants grow downwards, regardless of the direction of light. III. The direction of root growth is decided only by the direction of sunlight. Which conclusions are correct?

• A. I and II only
• B. II and III only
• C. I and III only
• D. All three

Q14. Consider the following statements about mosquitoes from the chapter: I. Female mosquitoes are blood-sucking insects. II. They transmit diseases like malaria, dengue and chikungunya. III. Newspapers and school noticeboards advise that mosquito breeding should be prevented. Which statements are correct?

• A. I and II only
• B. II and III only
• C. I and III only
• D. All three

Q15. Assertion (A): Jagadish Chandra Bose's crescograph could be used to measure how fast plants grow. Reason (R): The crescograph was a machine built to record how plants respond to stimuli like light, heat, electricity and gravity.

• A. Both A and R are true, and R is the correct explanation of A.
• B. Both A and R are true, but R is NOT the correct explanation of A.
• C. A is true, R is false.
• D. A is false, R is true.