Parts of two plant were obsreved struct ure A develops from undergound part of the stem grows obliquely becomes aerial and produce rots on its lower surface structre B develop aerially and produces roots when comes in contact with soil

Which of the following are incorrect? A. Plant seeds develop in ovule which itself usually becomes the fruit. B. Plants produce flowers in order to make seeds, so that their species can propagate, C. Just as roots of some plants store food, they may also have nodes, internodes and buds. D. For photosynthesis, leaves take in carbon dioxide and water from soil to release oxygen in air.

When a person eats sugary food, then organisms A present in his mouth act on sugar to produce a substance B. The substance B first dissolves the calcium salts from the part C of the tooth and them from its middle part D froming holes E. These holes ulitimately reach the part F in the lower part of tooth which contains nerves and blood vessels. The substance B irritates the nerves ending inside the tooth causing toothache. (a) What are (i) organisms A, and (ii) substance B ? (b) What are (i) part C, and (ii) part D, of tooth known as ? (c) By what name are the holes E in the tooth known ? (d) Name the part F of the tooth (e) What will happen if organisms A reach part F of the tooth ?

Max Ltd., a foreign company , started its business in a under-developed contry. The size of the business is quite large. The company hs plenty of resources. It employs thousands of people in the under-developed country. The raw materials used by the company are readily available here. However, since there was not demand for these raw materials here, the producers were unable to get the best price for it. Due to this reason, the producers were discourged. Some local businessmen used to act arbitrarily earlier, but now they have corrected themselves. The reason for their becoming better is competition with the foreign company. Now their arbitrary approach has ended altogether. Max Ltd. is using completely the latest technology in its various business activities. As a result, the local people also have got the opportunity to learn the new technology. Because of using the modern technology and doing production at a large scale, the company's cost of production is very low. Because of its hugs size and status, the company occupied a dominant position in the market and took over some domestic firms. (a) Which type of business enterprise is referred to in the above para ? (b) State any three features of the enterprise identified in (a) by quoting the lines from the above para.

Study the following lists List-I A) Apices of underground branches B) Underground branches grow C)Aerial branches grow obliquely D) Weak stemmed plants have a cluster List-11 I) Banana store food material II) Grasses obliquely upward from the axillary buds of nodes of the stem below the soil III) Agave downwards and produce adventitious IV) Potato roots after touching the soil V) Jasmine of leaves and roots at every node The correct match is

Read the following paragraph and answer the questions based on it. Rhizobium produce nitrogenous compounds from atmospheric nitrogen. However, for this process of nitrogen fixation, they need leguminous plants like beans, sweet pea, soyabean, etc. as ‘host’. Rhizobium living in root nodules supply nitrates, nitrites and amino acids to that plant and in exchange get energy in the form of carbohydrates from it. Such a mutually beneficial relationship is called symbiosis. Beans and pulses are rich in proteins due to the nitrogenous compounds made available by Rhizobium. After harvesting a leguminous crop, the left-over roots and other plant parts are deliberately dumped in farm soil to maintain its bacterial population. The use of Rhizobium has helped to reduce the use of chemical fertilizers and thereby their adverse effects. It has also helped to reduce expenses on fertilizers and thus works to the benefit of farmers. How do the soil conditions improve by Rhizobium?