What is Chapter 17 forest lifeline of science about?

Plants release oxygen in the atmosphere during the process of photosynthesis. This oxygen is inhaled by the animals for respiration. During respiration, they release carbon-dioxide which is absorbed by plants….NCERT Solutions for Class 7 Science Chapter 17 Forests Our Lifeline.

What are decomposers Ncert solutions?

Answer: Decomposers are micro-organisms that convert the dead plants and animals to humus. Bacteria and fungi are the two types of decomposers.

How is forest our lifeline?

Forests are our lifeline. We all depend upon forests in some way or the other for survival. Forests provide us with fresh air to breathe, food, medicines, and other sources like wood, fodder and other raw materials for the industries. Forests prevent soil erosion and hold the earth firmly.

What helps the forest to grow and regenerate?

Soil helps forests to grow and regenerate.

Why forest are called green lungs?

Plants release oxygen through the process of photosynthesis which helps the animals for respiration. They also maintain the balance of oxygen and carbon dioxide in the atmosphere. That is why the forests are called green lungs.

What is importance of forest?

Forests are vital to life on Earth. They purify the air we breathe, filter the water we drink, prevent erosion, and act as an important buffer against climate change.

What is the difference between food chain and food web?

A food chain is a basic network that shows the linear flow of nutrients and energy from one trophic level to another. A food web is a multitude of food chains that are interconnected at many trophic levels. Furthermore, a food web accurately represents all the various food chains that exist in an ecosystem.

Why there is no waste in forest?

When the plants and animals die in the forest, this is considered as waste. When they die, the microorganisms present in the soil helps to convert the waste into hummus or nutrients for the soil which in turn used by plants. And, therefore forest doesn’t contain any waste materials.

What is tree crown?

The crown of a woody plant (tree, shrub, liana) is the branches, leaves, and reproductive structures extending from the trunk or main stems.

Is a system comprising various plants animals and microorganisms?

Forest is a system comprising various plants, animals and micro-organisms.

Which of the following is not a forest product gum plywood sealing wax kerosene?

Gum, plywood and sealing wax are forest products whereas Kerosene is a fossil fuel. So,it’s not a forest product.

What is crown of a tree?

The crown of a woody plant (tree, shrub, liana) is the branches, leaves, and reproductive structures extending from the trunk or main stems. Shapes of crowns are highly variable.

Which country is called lungs of world?

The lungs of the earth “Brazil’s Amazon Forest” is on fire for a month declaring a state of emergency in the region. But don’t let them ruin our beautiful rhythms.” The lungs of the earth “Brazil’s Amazon Forest” is on fire for a month declaring a state of emergency in the region.

What is forest and wildlife?

In the environment, forests and wildlife are interconnected. A forest is a big region of land dominated by trees, aquatic biomes, multiple species of animals, and a million different microorganisms. Many wild animals can be found in the forests.

What is difference between consumer and producer?

When people make goods and services, goods and services, goods and services—when people make goods and services, they are producers. When they use the things produced, the things produced, the things produced—when they use the things produced, they are consumers.

How are primary consumers different from secondary consumers?

The primary consumers are herbivores (vegetarians). The organisms that eat the primary consumers are meat eaters (carnivores) and are called the secondary consumers. The secondary consumers tend to be larger and fewer in number. This continues on, all the way up to the top of the food chain.

Why should we worry about the conditions and issues related to forests far from us Class 7?

Forests are very important resources. We should be careful and concerned about the issues related to forest due to following reasons: If there are no forests, there would be more floods and more soil erosion. Forests affect the global environment in a great way.

What is called canopy?

In biology, the canopy is the aboveground portion of a plant cropping or crop, formed by the collection of individual plant crowns.