All questions of Trees, Plants, Flowers & Fruits for Class 1 Exam

Pine

Understanding Cacti: The Saguaro
The Saguaro cactus is one of the most iconic types of cacti, native to the Sonoran Desert in Arizona, California, and Mexico. Here’s why it stands out among the other options listed:
Distinct Characteristics
- Size and Shape: The Saguaro can grow to be quite large, often reaching heights of up to 40 feet and living for over 150 years.
- Arms: It is well-known for its upward-reaching arms, which typically begin to grow when the cactus is around 50-70 years old.
Habitat
- Desert Environment: The Saguaro thrives in arid desert conditions, showcasing its adaptability to extreme heat and drought.
- Water Storage: This cactus can store significant amounts of water in its tissue, allowing it to survive long periods without rainfall.
Ecological Importance
- Wildlife Support: The Saguaro provides habitat and food for various desert species, including birds, insects, and mammals.
- Pollination: Its flowers, which bloom at night, attract pollinators like bats and bees, playing a crucial role in the ecosystem.
Comparison with Other Plants
- Sunflower, Rose, and Dandelion: Unlike these plants, which are typically found in gardens or meadows, the Saguaro is specifically adapted to desert life.
- Diversity: While sunflowers, roses, and dandelions are flowering plants, the Saguaro belongs to the family of cacti, known for their unique adaptations to dry environments.
In summary, the Saguaro cactus is a remarkable plant that showcases the beauty and resilience of desert flora, making it a common and celebrated type of cactus.

Understanding Plant Growth Needs
Plants require several essential elements to grow and thrive. The correct answer, option 'C', identifies the three critical components: water, sunlight, and soil. Here's a breakdown of each factor:
Water
- Water is crucial for plants as it facilitates the transport of nutrients from the soil to the plant cells.
- It helps maintain cell structure and is involved in photosynthesis, the process by which plants convert light energy into chemical energy.
Sunlight
- Sunlight is the primary energy source for plants. Through photosynthesis, plants use sunlight to produce their food.
- Chlorophyll, the green pigment in plants, captures sunlight and transforms it into energy, enabling growth and the production of oxygen.
Soil
- Soil provides anchorage for plants and is a reservoir of nutrients. It contains minerals that are vital for plant health.
- Different types of soil (sandy, clay, loamy) offer various benefits, affecting water retention and nutrient availability.
Why Other Options Are Incorrect
- Option 'A' (Only water) is incorrect because, without sunlight, plants cannot produce food.
- Option 'B' (Only sunlight) is wrong as plants need water and nutrients from the soil to grow.
- Option 'D' (Only air) overlooks the necessity of water and sunlight for photosynthesis and growth.
Conclusion
In summary, for healthy growth, plants require a balanced combination of water, sunlight, and soil. Understanding these needs is fundamental in nurturing plants successfully.