SCIENCE BLOG : FOREST OUR LIFELINE
Forest is a natural as well as renewable resource which makes the habitat of various wildlife that is why we term forest our life line. We can find various long trees like neem, palash, amla, khair, bamboo etc. Many forms of wild animals like bear, bison, deer ( herbivores), porcupine, elephant ( herbivores) take shelter in the forest. The forest also occupies place for honeybees and birds which help in pollination in the flower bearing plants by the process pollination. Trees, shrubs and herbs make different or various layers in forest our lifeline which we describe here ( herbivores).
STRUCTURE OF THE FOREST OUR LIFELINE
- Canopy: Tall trees have uppermost branches and leaves which act as roof top over the forest ground. This we term as canopy.
- Crown: Down ward branchy part in the forest tree above main trunk is called crown. Different types of crown in the forest we term as understorey.
- Top layer : Tall trees , tall grass, shrubs
- Shrub layer: Small shrubs, bushes with 1-2 meters height. This layer creates thick layer over forest ground . Here enough sunlight is not reached.
- Herb layer: Herbaceous plant with short life span
- Forest floor: Mosses, liverworts, lichens which are symbiont in nature. It includes all types of insects, worms, toad stool etc.
FOREST OUR LIFELINE CLASS 7 EXTRA QUESTION ( herbivores):
VERY SHORT TYPE QUESTION ( herbivores)
Qs1: Are there similar kind of trees in every forests?
Ans1: No, in forest our lifeline ,there are variations in the types of trees and other plants due to different climatic conditions from forests to forests ( herbivores).
Qs2: What is canopy?
Ans2: Canopy is the highest branches and leaves of tallest trees. It makes like roof top around forest.
Qs3: Name any four useful products other than wood, which we get from forests.
Ans3: Gum, Spices, Honey and Fodder for animals are four useful products other than wood which we obtain from the forests our lifeline.
GIVE REASONS IN FOREST OUR LIFELINE CLASS 7 EXTRA QUESTIONS ( herbivores)
Qs4: Give the reason behind variations found in the forests of different regions in the forest our lifeline.
Ans4: Due to changeable climatic condition of various area, we can see different types of plants and animals.
Qs5: While going inside a forest, it becomes darker, why?
Ans5: We can see various types of plants like large trees, middle size shrubs and other creeper, climber and herbaceous plants. They trap solar radiation for photosynthesis. Therefore, sunrays cannot reach the floor of forest, in this way it makes the forest floor lightless ( herbivores).
Qs6: Deforestation may lead to floods. Why ( herbivores)?
Ans6: Deforestation causes various calamities like flood etc. If trees are not present in the forest, there will be flood. As bare soil cannot hold water
Qs7: Necessity of all animals can be fulfilled by forest. Justify this statement in a few sentence.
Ans7: Forest provides shelter, food and water to the animals living there. In this way , necessity of all animals present in a forest can be completed ( herbivores) .
EXPLAIN THE FOLLOWING IN THE FOREST OUR LIFELINE:
Qs8: Life would be impossible without plants. Explain how.
Ans8: All green plants are producers. They make food by the process of photosynthesis using water, CO2 and sunlight. All forms of animals depends on plants for food. Therefore, food is not possible without plant. Plants give oxygen during photosynthesis. In absence of plant , there is no oxygen. Food and oxygen are two basic necessity which are important for us. These two thing are made by plants.
Qs9: If any animal dies in the forest , what happens then ( herbivores)?
Ans9: Scavengers like vulture, jackals, hyenas etc use to eat the dead bodies of the those killed animal. These animals help in cleaning the environment of the forest. This phenomena proves that in forest ecosystem nothing can be destroyed here.
Qs10: Can you construct a producer less food chain? Justify.
Ans10: No, producer is the must element always in the food chain as top layer. Producer supplies food to all living world. In a food chain, if producer is absent in the forest our lifeline, then there will be no flow of energy. Therefore, Food chain cannot be formed in absence of producer.
LONG TYPE QUESTION IN FOREST OUR LIFELINE:
Qs11: We can notice peepal sapling grown on the wall of some buildings. How is it done?
Ans11: Animals disperse the seeds of certain plants with the help of their droppings. So, bird drops by their excretion on the wall in the forest. On coming in contact with water and suitable nutrient medium, it would have grown into papal sapling in the forest our lifeline.
Qs12: If we remove one component of the forest our lifeline . What would be its affect on the ecosystem?
Ans12: Every component of forest depend on other. If any component is removed, other element will be in danger e.g. if we remove top carnivores like lion or tiger in a forest, herbivores will increase and if they increase they will end up eating all plants. So ecosystem will get disturbed.
Qs13: State the role of scavengers in cleaning of our environment.
Ans13: Scavengers eat the dead animals and act as the cleaning agents of our environment. Some of these scavengers animals like vulture, crows jackals, hyena, some insects etc.
HIGHER ORDER THINKING SKILLS IN FORST OUR LIFELINE:
Qs14: We know that in the forest there is no waste products.Justify.
Ans14: In the forest anything cannot be spoiled due to following reasons:
(i) Humus contains residue of dry leaves and dead animals. This black coloured substances provide nutrients to the soil.
(ii) Vultures, crow like scavengers can get food from dead animals.
(iii) Nearby village people beside forest use to pick the branches fallen from trees .
Qs15:Forest is a dynamic entity, full of life and vitality: in the forest our lifeline . Explain briefly.
Ans15: Forests harbor great variety of plants and animals. Plants provide food to herbivores. If there are many herbivores, then carnivorous animals can get increased amount of food. Vast range of animals help to replenish forest.