Living Creatures: Exploring Their Characteristics – MCQs with Answers and Explanations
Class 6
Science
Chapter 10
Living Creatures: Exploring Their Characteristics — 40 Topic-wise MCQs
CBSE Board Examinations
Click "Show Answer & Explanation" to reveal the correct option and reasoning for each question.
Exam Guidance
- MCQs test quick recall and understanding. Read all options before selecting.
- Use explanations to reinforce why an option is correct and related concepts from the chapter.
- Ideal for timed practice or classroom quizzes — revisit explanations for mastery.
Basics of Living Things
1Which feature is NOT used to identify living things?
Correct: C. Movement when pushed.
Explanation: Movement caused by external forces (like pushing) is not a life process. Life processes include growth, reproduction and respiration performed by organisms themselves.2The mnemonic MRSGREN helps remember:
Correct: B. Life processes.
Explanation: MRSGREN stands for Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion, Nutrition — the key processes of life.3Which of these is a living thing?
Correct: B. Bacteria.
Explanation: Bacteria perform life processes like nutrition, growth and reproduction; rocks, cars and sand are non-living.4Which statement is true about life processes?
Correct: C. Both plants and animals perform life processes.
Explanation: Plants and animals both carry out life processes such as respiration, growth and nutrition, though mechanisms differ.Movement
5Phototropism is seen when:
Correct: B. Plant bends toward light.
Explanation: Phototropism is growth movement of plant parts toward light to enhance photosynthesis.6Which organism shows rapid movement on touch?
Correct: B. Mimosa pudica.
Explanation: Mimosa pudica folds its leaves quickly when touched — an example of sensitivity and rapid movement of parts.7Locomotion is best shown by:
Correct: B. Dog running.
Explanation: Locomotion is whole-body movement from place to place, as in animals moving to find food or escape danger.8Which of these is a movement of parts, not locomotion?
Correct: C. Sunflower turning toward sun.
Explanation: Plant parts moving (like turning toward sun) is movement of parts due to growth, not locomotion which is whole-body movement.Respiration
9Which gas is needed for cellular respiration in most organisms?
Correct: C. Oxygen.
Explanation: Oxygen is used in aerobic respiration to help break down food and release energy; carbon dioxide is a waste product.10Breathing is different from cellular respiration because:
Correct: C. Breathing is physical while cellular respiration is chemical.
Explanation: Breathing moves air in/out of lungs; cellular respiration breaks down food at cellular level to release energy.11Which of these indicates respiration in humans?
Correct: B. Breathing.
Explanation: Breathing (inhalation and exhalation) is a visible manifestation connected to respiration in humans.12Yeast producing bubbles on sugar solution is an example of:
Correct: B. Fermentation (anaerobic respiration).
Explanation: Yeast breaks down sugar anaerobically producing carbon dioxide bubbles — a form of respiration in microorganisms.Sensitivity & Response
13Plants bending toward light is an example of:
Correct: A. Phototropism.
Explanation: Phototropism is growth toward light; geotropism is gravity response, hydrotropism is water response.14Which sense helps animals detect danger quickly?
Correct: D. All of the above.
Explanation: Animals use multiple senses (sight, smell, hearing, touch) to detect and respond to threats quickly.15A plant folding leaves on touch shows:
Correct: B. Sensitivity.
Explanation: Folding of Mimosa pudica leaves on touch is a response to stimulus, showing sensitivity.16Which term describes root growth downwards in response to gravity?
Correct: B. Geotropism.
Explanation: Geotropism (gravitropism) is growth response to gravity; roots grow downwards, shoots upwards.Growth
17Which is NOT a sign of growth?
Correct: C. Temporary swelling due to water.
Explanation: Temporary swelling is reversible and not true growth, unlike cell division or permanent increase in size/mass.18What helps a seedling grow after germination?
Correct: A. Stored food in seed.
Explanation: Stored food fuels early growth until the seedling can photosynthesise on its own; water, oxygen and light are also important but initial growth relies on stored nutrients.19Repair of a broken bone is an example of:
Correct: B. Growth/repair.
Explanation: Repair involves new cell growth and tissue formation — part of growth processes in organisms.20Which factor does NOT directly affect growth?
Correct: D. Colour of clothes.
Explanation: Colour of clothes is unrelated to biological growth; nutrition, light and environmental humidity can influence growth, especially in plants.Reproduction
21Which is an example of asexual reproduction?
Correct: B. Budding in yeast.
Explanation: Budding produces a new organism from a single parent without gamete fusion — an asexual method. Seed formation, pollination and fertilisation are sexual processes.22Which part of a flowering plant develops into a seed after fertilisation?
Correct: A. Ovary.
Explanation: After fertilisation, the ovary develops into a fruit containing seeds; stamens produce pollen (male gametes).23Which is an advantage of sexual reproduction?
Correct: B. Genetic variation.
Explanation: Sexual reproduction mixes genes from two parents, creating variation that can help populations adapt to changing environments.24Which method helps spread plant seeds by sticking to animal fur?
Correct: C. Animal (biotic) dispersal.
Explanation: Seeds like burrs stick to animal fur and are carried to new places — a biotic dispersal method helping species spread.Nutrition
25Which organisms make their own food by photosynthesis?
Correct: C. Green plants.
Explanation: Green plants contain chlorophyll to capture sunlight and make glucose from CO2 and water via photosynthesis; animals and fungi are heterotrophs.26Which is a heterotroph?
Correct: B. Cow.
Explanation: Cows consume plants for nutrition and cannot synthesise their own food, so they are heterotrophs; grass and trees are autotrophs.27Which gas is released during photosynthesis?
Correct: A. Oxygen.
Explanation: Oxygen is a by-product of photosynthesis when plants convert CO2 and water into glucose using sunlight.28Which of these is a saprophytic organism?
Correct: B. Mushroom.
Explanation: Mushrooms (fungi) feed on dead organic matter by absorption — saprophytic nutrition; plants are autotrophs, cows are heterotrophs.Excretion
29Which organ removes waste urea from human blood?
Correct: B. Kidney.
Explanation: Kidneys filter blood to remove urea and excess salts, producing urine; lungs remove CO2, not urea.30Which process removes carbon dioxide from the body?
Correct: B. Breathing out (exhalation).
Explanation: Carbon dioxide produced in cells is carried to lungs and exhaled; sweating/excretion remove other wastes.31Plants release oxygen mainly during:
Correct: B. Day (photosynthesis).
Explanation: During daylight, photosynthesis produces oxygen; at night plants respire and consume oxygen.32Which of these is a waste product of cellular respiration?
Correct: C. Carbon dioxide.
Explanation: Cellular respiration breaks down glucose and produces CO2 and water as waste products; oxygen and sunlight are inputs for other processes.Classification — Vertebrates & Invertebrates
33Which of these is a vertebrate?
Correct: C. Frog.
Explanation: Frogs are amphibians with a backbone (vertebrates); earthworms, butterflies and spiders are invertebrates.34Birds are classified as vertebrates because they have:
Correct: B. Backbone.
Explanation: Presence of backbone (vertebral column) is a key feature of vertebrates; feathers and wings are adaptations but not the defining trait.35Which of these invertebrates helps in soil aeration?
Correct: A. Earthworm.
Explanation: Earthworms burrow and mix soil, improving aeration and fertility; sparrows, frogs and lizards are vertebrates.36Which group includes animals that usually have hair and feed young with milk?
Correct: C. Mammals.
Explanation: Mammals have hair/fur and mammary glands producing milk to feed offspring; this distinguishes them from other vertebrates.Applications & Safety
37Why is understanding life processes useful in daily life?
Correct: B. It guides health, nutrition and hygiene choices.
Explanation: Knowledge of life processes informs diet, disease prevention and care — practical benefits for everyday well-being.38Which practice helps keep plants healthy and supports their life processes?
Correct: B. Giving balanced water, light and nutrients.
Explanation: Proper water, sunlight and nutrients support photosynthesis, growth and overall plant health — extremes harm plants.39Which safety habit is important during a school biology practical?
Correct: B. Wear safety goggles and follow teacher instructions.
Explanation: Safety gear and supervision prevent accidents; unsafe practices like tasting or smelling chemicals are hazardous.40Which of these best shows why biodiversity matters?
Correct: B. Diverse species support food chains and ecosystem services.
Explanation: Biodiversity ensures ecosystem stability, food provision, pollination and other services crucial for life on Earth.