All questions of Living Creatures: Exploring their Characteristics for Class 6 Exam

The larva stage in the life cycle of a mosquito is aquatic and feeds on organic matter.

Understanding Germination
Germination is the key process by which a seed transforms into a new plant. It marks the beginning of a plant's life cycle and is crucial for the propagation of plant species.
Stages of Germination
- Seed Dormancy: Before germination, seeds are often in a dormant state. They require specific conditions such as moisture, temperature, and sometimes light to initiate the process.
- Water Absorption: The seed absorbs water through a process called imbibition. This hydration activates enzymes that trigger metabolic processes.
- Growth Initiation: Once hydrated, the seed's embryo begins to grow. The radicle (embryonic root) emerges first, anchoring the plant and absorbing nutrients from the soil.
- Shoot Emergence: Following the root, the shoot (plumule) breaks through the soil surface. This leads to the development of leaves, which will start photosynthesis.
Conditions for Germination
- Moisture: Adequate water is essential for activating the seed's metabolic processes.
- Temperature: Different seeds have specific temperature ranges that favor germination. Most seeds germinate best in warm conditions.
- Oxygen: Seeds require oxygen for respiration, which is necessary to produce energy for growth.
Importance of Germination
- Plant Growth: Successful germination leads to the establishment of new plants, contributing to biodiversity and ecosystem stability.
- Agriculture: Understanding germination is crucial for farmers and gardeners to ensure healthy crop production.
In summary, germination is a vital biological process that leads to the formation of new plants from seeds, ensuring the continuation of plant life and contributing to the environment.

Role of Stomata in Plants
Stomata are tiny openings, primarily located on the underside of leaves, that play a crucial role in the life of plants. Their main function is gas exchange, which is essential for processes such as photosynthesis and respiration.
Gas Exchange
- Oxygen and Carbon Dioxide: Stomata allow carbon dioxide (CO2) to enter the plant for photosynthesis while enabling the release of oxygen (O2) as a byproduct.
- Respiration: During respiration, plants take in oxygen and release carbon dioxide. Stomata facilitate this exchange, ensuring that plants can perform both processes efficiently.
Water Regulation
- Transpiration: Stomata also play a vital role in transpiration, a process where water vapor is released from the plant into the atmosphere. This helps in cooling the plant and maintaining nutrient flow from the roots to the leaves.
- Homeostasis: By opening and closing, stomata regulate water loss and maintain internal balance, preventing excessive dehydration.
Environmental Adaptations
- Response to Conditions: Stomata can open or close in response to environmental conditions such as light intensity, humidity, and carbon dioxide levels. This adaptability helps plants optimize their gas exchange and water use.
In summary, stomata are essential for the exchange of gases in plants, allowing for vital processes like photosynthesis and respiration while also regulating water loss. This makes option 'B' the correct answer regarding the role of stomata in plants.

Metamorphosis is a process where animals undergo significant transformations in their body shape and structure as they progress through different life stages.

Reproduction is the biological process by which new individuals of the same species are produced.

A sunflower turning its head to face the sun (phototropism) is an example of movement in plants.

Sweating to remove excess salts is an example of excretion in humans.

Plants respond to stimuli by showing movements like phototropism, where shoots grow toward light, or by folding their leaves.

Understanding Respiration
Respiration is a vital process carried out by living organisms to extract energy from food. This energy is essential for various life functions.
How Respiration Works
- During respiration, organisms take in oxygen and use it to break down glucose (a type of sugar derived from food).
- This chemical reaction occurs in cells and results in the production of energy, carbon dioxide, and water.
Importance of Oxygen
- Oxygen plays a crucial role in aerobic respiration, which is the process used by most living beings.
- The presence of oxygen allows for the complete breakdown of glucose, yielding maximum energy.
Energy Generation
- The energy produced during respiration fuels vital activities such as:
- Movement
- Growth and development
- Repairing damaged tissues
- Maintaining body temperature
Comparison with Other Options
- Option A: Producing new cells without oxygen is incorrect, as most cells require energy from respiration to grow and divide.
- Option C: Efficient waste excretion is a function of the excretory system, not directly tied to respiration.
- Option D: Reproduction is a biological process that can occur at any time, not limited to daylight.
Conclusion
In summary, respiration primarily allows living beings to generate energy from food using oxygen, making option 'B' the correct choice. This energy is fundamental for all life processes, enabling organisms to survive and thrive in their environments.

Nutrition is the process by which living beings obtain and use food for their growth, energy, and maintenance.

The froglet stage is when a frog develops legs and lungs, transitioning from an aquatic to a terrestrial environment.

Respiration is the process by which living beings exchange gases with their environment, taking in oxygen and releasing carbon dioxide.

Non-living things do not display the essential traits of life like growth, reproduction, respiration, or response to stimuli.

A rock is an example of a non-living thing as it does not exhibit characteristics of life such as growth, respiration, or reproduction.

Germination is the process that starts when a seed absorbs water, softening the seed coat and activating enzymes that allow the embryo to grow into a new plant.

The life cycle of a plant starts with seed germination, continues with growth and maturation (flowering and fruit/seed production), and ends with the plant's death, ensuring the cycle repeats.

Excretion is the process by which living organisms remove waste products from their bodies to maintain internal balance.

Nutrition supplies the necessary energy and materials for growth, development, and repair of tissues, which are essential for survival.

Plants exhibit phototropism: their shoots grow toward the light source, while their roots continue to grow downward into the soil.

Seed germination requires water to activate enzymes, air for oxygen, and appropriate environmental conditions to start growth.

Reproduction is vital because it allows living beings to produce new individuals and ensure the survival of their species.

Respiration is the process in which organisms take in oxygen and release carbon dioxide to produce energy from food.

Living beings exhibit traits like growth, reproduction, response to stimuli, movement, respiration, excretion, and nutrition, which non-living things do not.