Question 9 What are weeds? They help in enriching the soil with organic matter and nutrients. This makes the soil infertile. Thus, various weeding methods are employed. This method is more important in areas where there is a lack of water and where there is a demand for water. Glucose during respiration inhalation of oxygen is oxidised with the liberation of energy as shown below: Thus, respiration is an exothermic process. Answer 3: We know that constituent elements in a compound are bound by chemical bonds. Thus, depending on whether overall energy is given out or consumed, the reaction is either exothermic or endothermic.
The addition of manure does not require any special guidelines. The addition of fertilisers to the soil requires special guidelines such as dose time, post addition precautions, etc. Question 7: If wheat is sown in the kharif season, what would happen? This will give you confidence and ensure that the topics are fresh in your mind. Byju's is India's largest k-12 learning app with top notch teachers from across the nation with excellent teaching skills. Download links are at the end of online solutions of each chapter.
State three differences between them. Visit to of the page. This is the most efficient method of irrigation as there is no wastage of water at all. Answer 7: During digestion, food is broken down into simpler substances. Arrange the following boxes in proper order to make a flow chart of sugarcane crop production. Weedicides are not harmful to crops.
Download links are at the end of online solutions of each chapter. Find notes, question papers for various other subjects like Mathematics, Biology, Chemistry and many competitive exams as well. They ate raw fruits and vegetables and started hunting for animals for food. Manure provides humus to the soil and increases soil fertility. This will improve the net yield of the crop.
If wheat is sown in the kharif season, what would happen? The seeds that are selected for growing should be of good quality. Cell organelles such as plastids, mitochondria, golgi bodies, etc. The cytoplasm helps in the exchange of materials between cell organelles. This is the most efficient method of irrigation as there is no wastage of water at all. Heavier box will put more force on the floor surface as compared to lighter box and therefore will experience more opposite force friction.
These activities or tasks are referred to as agricultural practices. The addition of fertilisers to the soil requires special guidelines such as dose time, post addition precautions, etc. When a farmer continues to grow crops one after the other, then all nutrients available in the soil reduce and the crop yield decreases automatically. Visit to of the page. A machine used for cutting the matured crop. Question 10: Complete the crossword with the help of clues given below. Question 1: Indicate whether the following statements are True T or False F.
Providing water to the crops. Chromosomes play an important role in the inheritance of characters. Farmers store grains in jute bags or metallic bins. Answer: Chloroplasts are found only in plant cells. Answer Fertiliser Manure Fertilisers are commercially available plant nutrients. This machine is a combined harvester and thresher.
Certain plants of the same kind grown on a large scale. The nuclear membrane has nuclear pores that allow the transfer of specific substances in and out of the nucleus. . The loose soil allows the roots to breathe easily even when they go deep into the soil. The commonly carried out methods of weeding are as follows: I The weeds can be completely controlled by the usage of weedicides which is a powerful chemical sprayed on the crops in the fields to destroy all the unwanted weeds.
Answer 1 a Friction opposes the motion between the surfaces in contact with each other. Plants contain nearly 90% water. The nucleus is composed of the following components: i Nuclear membrane: It is a double-layered membrane which separates the contents of the nucleus from the cytoplasm. Describe two methods of irrigation which conserve water. There are various sources of irrigation such as wells, canals, rivers, dams, ponds, and lakes. Answer 7 Wheat is a rabi crop, hence it requires cold climatic conditions to be grown properly. From this, you can analyze what your teacher thinks is important and what should be given in the test.
Download links are at the end of online solutions of each chapter. The difficult chapters such as The Indian Constitution, Secularism, parliament, judiciary and Marginalisation have been explained in a very easy to digest manner. Water is absorbed by the plant roots. Visit to of the page. Test yourself after studying each chunk.