10th
- What can you as an individual do to reduce your consumption of the various natural resources? Natural resources such as water, forests, coal and petroleum, etc. are important for the survival of human beings. The ways in which we can... 1
- How can you as an individual contribute or make a difference to the management of (a) forests and wildlife (a) Forest and wildlife: We should protest against the cutting of trees (deforestation). We should protest against the poaching of wild anim... 1
- We saw in this chapter that there are four main stakeholders when it comes to forests and wildlife The forest department of the government should have the authority to decide the management of forest produces. This is because the forest de... 1
- Can you suggest some changes in your school which would make it environment-friendly? Changes that can be undertaken in our schools to make it environment friendly are: Electricity can be saved by switching off lights and fans... 1
- What changes would you suggest in your home in order to be environment-friendly? Changes that can be undertaken in our homes to be environment-friendly are: Switch off the electrical appliances when not in use. Turn the t... 1
- Compare the above system with the probable systems in hilly/mountainous areas or plains or plateau regions. In plains, the water harvesting structures are crescent-shaped earthen embankments. These are low, straight, and concrete. In hilly regions,... 1
- Suggest some approaches towards the conservation of forests. Some approaches towards the conservation of forests are: Conversion of forests into national parks, sanctuaries. To take help of local peopl... 1
- Why should we conserve forests and wildlife? We should conserve forests and wildlife because they are essential for us in following terms: Forest provide us oxygen, they cause rain fall... 1
- Why do you think there should be equitable distribution of resources? Natural resources of the Earth must be distributed among the people uniformly so that each and every one gets his share of the resource. Hum... 1
- How would these advantages differ from the advantages of using a long-term perspective in managing If resources are used in accordance with short term aims, present generation will be able to utilize the resources properly for growth and d... 1
- What would be the advantages of exploiting resources with short-term aims? If resources are exploited with short-term aims it will be very beneficial for the present generation as it will help in growth of economy a... 1
- What changes can you make in your habits to become more environment-friendly? We can be eco-friendly by: Using the principle of 3R's i.e. Reduce, Reuse and Recycle. Putting off unnecessary lights and fans. Using unlead... 1
- What is the difference between the manner in which movement takes place in a sensitive plant The movement of sensitive plants leaves takes place due to the sudden loss of water in the pad-like swelling (called pulvini) at the base of... 1
- Compare and contrast nervous and hormonal mechanisms for control and coordination in animals Difference between nervous and hormonal mechanism: Nervous system Hormonal system 1. Made up of neurons (nerve cell). 1. Made of secretory c... 1
- How are involuntary actions and reflex actions different from each other? Involuntary actions are not controlled by us they are independent process means there is no stimulus involved in these actions but reflex ac... 2
- What is the need for a system of control and coordination in an organism? Controlled movement must be connected to the recognition of various events in the environment, followed by only the correct movement in resp... 2
- How does chemical coordination occur in plants? Plants do not have nervous system but still sense the things because of stimulus such as gravity, light, chemicals(hormones), water, touch (... 1
- Which signals will get disrupted in case of a spinal cord injury? Reflex actions are involuntary actions and controlled by the spinal cord thus, gets disrupted in case of spinal cord injury. 2
- How does phototropism occur in plants? https://lh3.googleusercontent.com/-ZXrsr0D8MKg/YbXbLqNVhxI/AAAAAAAAC6s/VoLxyXZwcDAangRD7Xr1wpTage9Slbc1ACNcBGAsYHQ/image.png Photo means lig... 2
- Draw the structure of a neuron and explain its function. A neurons consists of three parts; (i) Cell body: It is a typical animal cell which contains cytoplasm and a nucleus. (ii) Dendrites: A numb... 1
- What is the function of receptors in our body? Think of situations where receptors do not work properly. All information from our environment is detected by the specialised tips of some nerve cells. These receptors are usually located in our sen... 1
- The brain is responsible for (a) thinking. (b) regulating the heart beat Correct option is d) all of the above. 2
- The gap between two neurons is called a (a) dendrite. (b) synapse. Correct option is b) synapse. 2
- Which of the following is a plant hormone? (a) Insulin (b) Thyroxin (c) Oestrogen (d) Cytokinin Correct option is d) Cytokinin 2