Value Based Questions in Science for Class 9 Chapter 7 Diversity in Living Organisms
These Solutions are part of Value Based Questions in Science for Class 9. Here we have given Value Based Questions in Science for Class 9 Chapter 7 Diversity in Living Organisms
“Raman lives in a coastal village. He is son of a fisherman. Whenever any unwanted animal comes in the net, instead of killing it, he puts back the same in the sea.” Answer the following questions based on above information
- What would have happened, had he killed those animals ?
- Give one reason to justify that Raman’s action is environment friendly.
- How can you contribute in the preservation of flora and fauna around you ? Mention any two steps.
(Sample Paper 2012—13)
- Killing of unwanted animals would have contributed to disturbing ecological balance.
- Raman is helping in conserving biodiversity.
- Spreading awareness about importance of biodiversity amongst classmates, family members and community members.
- Nonuse of products derived from wild animals.
- By becoming member of PETA (People for Ethical Treatment of Animals) and developing empathy and love for all living organisms.
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Seeing a bat flying over the roof of her house, Saira asked her papa
- What is this night flying bird ?
- How does it see during night ?
- What does it eat and how does it obtain the same ? What would be reply of her papa ?
- Bat is not a bird. It is a mammal that has patagia in the fore limbs to function as wings and help in flight.
- Bat does not require sharp vision for its flight. It flies through écholocation or sending echo waves that are interpreted to know the obstacles. Bat, therefore, “sees through its ears.”
- Bat feeds on small flying insects. The insects are located through sound waves produced by them. Feeding on insects functions as biocontrol method on the population of night flying insects. It is rule of nature and keeps ecological balance.
On a rainy day, Raghav found small brownish worm like animals crawling slowly over the ground of his school. On close examination he found that the animal has faintly segmented body.
- What is the possible identity of the animal ?
- Why is it seen only in the rainy season ?
- What is its ecological importance ?
- The identity of the crawling animal is earthworm.
- It lives in burrows inside the soil. In rainy season, the burrows get filled up with rain water. So the earthworms come out of them.
- Earthworm feeds on decaying fallen leaves and other organic remains. It pulverises the same. The worm castings are good source of soil nutrients. Earthworm is called farmer’s friend as it ploughs the soil by its burrowing habit and converts organic remains into manure.
While on a visit to hill station, Shaurya found extensive mat-like growth of very small erect green leafy plants over the wet rocks. The plants possess knobbed stalks over their tips.
- What are the plants seen by Shaurya ?
- What is the name of knobbed stalks.
- What is the reason of abundant growth of the plants.
- Write down about the impact of the plants on the rocks.
- Shaurya saw moss plants growing on wet rocks.
- The knobbed stalks present over tips of moss plants are sporophytes. The knobbed structures are capsules that bear spores.
- Moss plant has a high reproductive potential through spores and fragmentation of filamentous protenema that develops from them.
- By their extensive growth moss plants trap soil particles, corrode rock surface and develop cracks in them. This builds up soil that results in growth of first herbaceous plants and then larger plants like shrubs and trees. The phenomenon is called ecological succession.
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