Olympiad Test: Forests Our Lifeline - Class 7 MCQ

Branches of tall trees look like roof over the other plants in forest called canopy.

The microorganisms like bacteria and fungi convert plants and animal dead parts into humus are called decomposer.

an evergreen coniferous tree which has clusters of long needle-shaped leaves. Many kinds are grown for the soft timber, which is widely used for furniture and pulp, or for tar and turpentine.

Flora are plants found in particular localities. They grows in particular areas only.

The ovary of flower turns into fruits and ovules changes into seeds on maturity.

In village environment is not polluted due to absence of large number of industries and vehicles to make it cool and peaceful.

Cutting of tree on large scale is called deforestation. Deforestation leads to loss of plant and animal life.

A forest product is any material derived from forestry for direct consumption or commercial use, such as lumber, paper, or forage for livestock. Wood, by far the dominant product of forests, is used for many purposes, such as wood fuel (e.g. in form of firewood or charcoal) or the finished structural materials used for the construction of buildings, or as a raw material, in the form of wood pulp, that is used in the production of paper.

The stamen (plural stamina or stamens) is the pollen-producing reproductive organ of a flower.

The plant help to provide oxygen for animal respiration. They also maintain the balance of carbon dioxide in the atmosphere . That is why forest is called green lungs.

Animals play a crucial role in forest regeneration by dispersing seeds of certain plants and providing nutrients to seedlings through decaying dung. This process contributes to the growth and vitality of the forest.

Large number of living organisms is found in forests which includes plants, animals and microbes. The number of microorganism is maximum in forest.

Transpiration is the process by which moisture is carried through plants from roots to small pores on the underside of leaves, where it changes to vapor and is released to the atmosphere.

Cinchona plant is a medicinal plant used to prepare ayurvedic medicines.

Humus is produced due to decomposition of dead plants by bacteria and fungi.

Resins are obtained from forest but petrol, kerosene and plastics are manmade substance.

Plants with soft stem is called herbs. They generally creep on ground.

Sounds of birds and animals are common in The correct answer is C: All of these.

Solution:
- Birds and animals are found in various environments:
- Gardens: Birds often come to gardens for food and shelter.
- Agricultural fields: Birds and animals search for food here.
- Forests: Natural habitat for many species, making their sounds very common.
- Thus, sounds of birds and animals can be heard in all these places, making option C the most accurate.orests area.

The source of the forest:

• Animals and insects: The forest is home to a diverse range of animal species, including mammals, birds, reptiles, and amphibians. These animals rely on the forest for shelter, food, and water. Insects, such as bees and butterflies, also play a vital role in pollinating plants within the forest ecosystem.
• Water and food grain: Forests are crucial for the maintenance and regulation of water cycles. Trees help to absorb and store rainfall, reducing the risk of floods and soil erosion. Forests also act as natural water filters, purifying water sources. Additionally, forests provide a habitat for many food crops and grains, such as fruits, nuts, and seeds.

Conclusion: Therefore, the correct answer is option C: both. Forests are the source of animals, insects, water, and food grain, making them essential for the overall ecological balance and human well-being.

Plants help in water cycle as it release water in form of water vapour in the process of transpiration.