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All questions of Plants are Living Things for Year 3 Exam

Which part of the plant transports water from the roots to other parts?
  • a)
    Flowers
  • b)
    Leaves
  • c)
    Roots
  • d)
    Stems
Correct answer is option 'D'. Can you explain this answer?

Freak Artworks answered
The stem is responsible for transporting water and nutrients absorbed by the roots to other parts of the plant, including the leaves and flowers. This vascular system is essential for maintaining the plant's health, as it ensures that all parts receive the necessary resources for growth and functioning.
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What is transpiration in plants?
  • a)
    The loss of water vapor through leaves
  • b)
    The production of food
  • c)
    The process of seed germination
  • d)
    The absorption of nutrients
Correct answer is option 'A'. Can you explain this answer?

Yashina Kapoor answered
Transpiration is the process by which plants lose water vapor from their leaves into the atmosphere. This process helps to regulate temperature and facilitates the uptake of nutrients from the soil through the roots. Interestingly, transpiration contributes to the water cycle, as the water vapor released can eventually return to the soil and atmosphere.

Which part of the plant is primarily responsible for seed production?
  • a)
    Flowers
  • b)
    Roots
  • c)
    Leaves
  • d)
    Stems
Correct answer is option 'A'. Can you explain this answer?

Torcia Education answered
Flowers are the reproductive structures of flowering plants and are primarily responsible for producing seeds. They often contain both male and female reproductive organs, facilitating fertilization and seed formation. Interestingly, flowers can also attract pollinators, which play a vital role in the reproduction process.

What environmental condition can be fatal to plants?
  • a)
    Fresh air
  • b)
    Extreme heat or cold
  • c)
    Adequate sunlight
  • d)
    Sufficient water
Correct answer is option 'B'. Can you explain this answer?

Vp Classes answered
Extreme heat or cold can be fatal to plants, as each plant species has a specific temperature range within which it can thrive. Extreme conditions can disrupt physiological processes, leading to wilting or death. For example, freezing temperatures can cause the water inside plant cells to freeze, damaging the cells and making it impossible for the plant to survive.

Which characteristic is NOT a trait of living organisms?
  • a)
    They produce waste products
  • b)
    They cannot reproduce
  • c)
    They can move independently
  • d)
    They require sunlight
Correct answer is option 'B'. Can you explain this answer?

Indu Gupta answered
Reproduction is a fundamental characteristic of living organisms. All living things, including plants and animals, have the ability to reproduce to ensure the continuation of their species. This can occur through various methods, such as sexual or asexual reproduction. The inability to reproduce is not a characteristic of living organisms but rather a characteristic of non-living entities.

How does water play a role in photosynthesis?
  • a)
    It helps in seed production
  • b)
    It is a waste product
  • c)
    It is a raw material
  • d)
    It provides warmth
Correct answer is option 'C'. Can you explain this answer?

Freak Artworks answered
Water is a crucial raw material in the process of photosynthesis. Plants use water along with carbon dioxide and sunlight to produce glucose and oxygen. The glucose serves as food for the plant, while oxygen is released into the atmosphere, supporting life on Earth. This process illustrates the interdependence of plants and other living organisms in the ecosystem.

What is one reason why some materials, like wood or straw, are no longer considered alive?
  • a)
    They do not require water
  • b)
    They were never part of a living organism
  • c)
    They cannot grow or develop
  • d)
    They do not reproduce
Correct answer is option 'C'. Can you explain this answer?

Indu Gupta answered
Materials like wood or straw are considered no longer alive because they cannot grow or develop. Once parts of living organisms, these materials have undergone decomposition and lost their biological functions. This distinction is important in understanding the difference between living and non-living things, as only living organisms exhibit growth and reproductive capabilities.

What do baby plants require to start growing?
  • a)
    Air only
  • b)
    A seed with a root shoot and stem shoot
  • c)
    Sunlight only
  • d)
    Soil only
Correct answer is option 'B'. Can you explain this answer?

Indu Gupta answered
Baby plants, or seedlings, require a seed that contains both a root shoot and a stem shoot to begin their growth. The root shoot grows downward to absorb water, while the stem shoot grows upward to reach for light. This initial growth phase is known as germination, which is critical for a plant's development and establishment in its environment.

What role do roots play in a plant?
  • a)
    They conduct photosynthesis
  • b)
    They support the plant's structure
  • c)
    They absorb water and nutrients from the soil
  • d)
    They produce seeds
Correct answer is option 'C'. Can you explain this answer?

Vp Classes answered
Roots are crucial for a plant's survival as they absorb water and essential nutrients from the soil. This absorption is vital for the plant's overall health and growth, as water is required for photosynthesis and nutrient transport. Additionally, roots anchor the plant securely in the ground, helping prevent it from being uprooted by wind or other forces.

What should be done before consuming wild plants?
  • a)
    They should be cooked
  • b)
    They should be washed thoroughly
  • c)
    They should be dried
  • d)
    Their safety must be verified
Correct answer is option 'D'. Can you explain this answer?

Indu Gupta answered
Before consuming wild plants, it is crucial to verify their safety. Some plants can be toxic, and proper identification is necessary to avoid health risks. Verification can involve researching the plant species, consulting experts, or using reliable field guides. This precaution ensures that only safe and nutritious plants are consumed, preventing potential poisoning or adverse reactions.

How do plants contribute to the oxygen supply in the environment?
  • a)
    By absorbing carbon dioxide
  • b)
    Through photosynthesis
  • c)
    By consuming oxygen
  • d)
    By releasing heat
Correct answer is option 'B'. Can you explain this answer?

Yashina Kapoor answered
Plants contribute to the oxygen supply in the environment primarily through the process of photosynthesis. During this process, they convert carbon dioxide and water into glucose and oxygen, releasing the oxygen into the atmosphere as a byproduct. This oxygen is essential for the survival of most living organisms on Earth, including humans.

Which of the following statements is true about dead leaves?
  • a)
    They are considered no longer alive
  • b)
    They can produce food through photosynthesis
  • c)
    They contribute to the plant's growth
  • d)
    They are still part of a living plant
Correct answer is option 'A'. Can you explain this answer?

Freak Artworks answered
Dead leaves are no longer part of a living organism and are considered dead because they are detached from the plant that produced them. Once leaves fall off a plant, they cease to function in photosynthesis and other life-sustaining processes. Interestingly, dead leaves can still play a role in the ecosystem by providing nutrients as they decompose.

What happens to plants without sufficient water?
  • a)
    They will grow faster
  • b)
    They will thrive
  • c)
    They will produce more seeds
  • d)
    They may wilt and die
Correct answer is option 'D'. Can you explain this answer?

Indu Gupta answered
Without sufficient water, plants cannot perform essential functions such as photosynthesis, leading to wilting and potentially death. Water is critical for maintaining cellular turgor pressure, which keeps plants upright and healthy. A lack of water can stress the plant, resulting in yellowing leaves and stunted growth.

What is phototropism?
  • a)
    The method plants use to absorb water
  • b)
    The process of seed germination
  • c)
    The process of plants losing water through transpiration
  • d)
    The ability of plants to sense and grow towards light
Correct answer is option 'D'. Can you explain this answer?

Rahul Kumar answered
Phototropism is the growth response of a plant toward light. This behavior is crucial for maximizing photosynthesis, as plants need sunlight to produce food. The plant hormones called auxins are responsible for this response, as they promote cell elongation on the side of the plant that is away from the light, causing the plant to bend towards the light source.

What is the primary function of leaves in a plant?
  • a)
    To produce food through photosynthesis
  • b)
    To transport water from roots to other parts
  • c)
    To anchor the plant in the soil
  • d)
    To produce seeds for reproduction
Correct answer is option 'A'. Can you explain this answer?

Torcia Education answered
Leaves are essential for photosynthesis, a process where plants convert sunlight into energy. They contain chlorophyll, which allows them to capture light energy, and use it to transform carbon dioxide and water into glucose and oxygen. This food production is vital for the plant's growth and survival, making leaves one of the most crucial parts of a plant. Interestingly, some plants can adapt their leaf structure to optimize photosynthesis under different light conditions.

Chapter doubts & questions for Plants are Living Things - Year 3 Science IGCSE (Cambridge) 2025 is part of Year 3 exam preparation. The chapters have been prepared according to the Year 3 exam syllabus. The Chapter doubts & questions, notes, tests & MCQs are made for Year 3 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests here.

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