{"id":20569,"date":"2019-07-16T01:25:54","date_gmt":"2019-07-15T19:55:54","guid":{"rendered":"https:\/\/www.cbselabs.com\/?p=20569"},"modified":"2021-09-18T15:18:31","modified_gmt":"2021-09-18T09:48:31","slug":"ncert-solutions-for-class-11-biology-biological-classification","status":"publish","type":"post","link":"https:\/\/www.cbselabs.com\/ncert-solutions-for-class-11-biology-biological-classification\/","title":{"rendered":"NCERT Solutions For Class 11 Biology Biological Classification"},"content":{"rendered":"

NCERT Solutions For Class 11 Biology Biological Classification<\/span><\/h2>\n

Topics and Subtopics in\u00a0NCERT Solutions for Class 11 Biology Chapter 2 Biological Classification<\/strong>:<\/strong><\/p>\n\n\n\n\n\n\n\n\n\n\n\n
Section Name<\/strong><\/td>\nTopic Name<\/strong><\/td>\n<\/tr>\n
2<\/td>\nBiological Classification<\/td>\n<\/tr>\n
2.1<\/td>\nKingdom Monera<\/td>\n<\/tr>\n
2.2<\/td>\nKingdom Protista<\/td>\n<\/tr>\n
2.3<\/td>\nKingdom Fungi<\/td>\n<\/tr>\n
2.4<\/td>\nKingdom Plantae<\/td>\n<\/tr>\n
2.5<\/td>\nKingdom Animalia<\/td>\n<\/tr>\n
2.6<\/td>\nViruses, Viroids and Lichens<\/td>\n<\/tr>\n
2.7<\/td>\nSummary<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

NCERT Solutions <\/a>Class 11 Biology<\/a>Biology Sample Papers<\/a><\/p>\n

NCRT TEXT BOOK QUESTIONS SOLVED<\/strong><\/span><\/h3>\n

1.Discuss how classification systems have undergone several changes over a period of time?<\/span><\/strong>
\nSoln.<\/strong> <\/span>Biological classification is the scientific procedure of arranging organisms in a hierarchical series of groups and sub-groups on the basis of their similarities and dissimilarities. Scientists have proposed different systems of classification which have undergone several changes from time to time.
\nEarlier Aristotle proposed artificial system of classification, which divided animals and plants on basis of habitat. E.g., Aquatic (fish, whale), terrestrial (e.g., reptiles, cattle) and aerial (e.g., bat, birds). Then, natural system of classification was based on morphology^ anatomy, physiology, reproduction, ontogeny, cytochemistry, etc. After natural system, organisms were classified on basis of evolutionary relationships called phyloge\u00acnetic system. It is based on cytotaxonomy, chemotaxOnomy, numerical taxonomy and cladistic taxonomy.<\/p>\n

2.State two economically important uses of:<\/strong><\/span>
\n(a) heterotrophic bacteria<\/strong><\/span>
\n(b) archaebacteria<\/strong><\/span>
\nSoln.<\/strong><\/span> (a) Heterotrophic bacteria: They include saprotrophic, symbiotic and parasitic bacteria. They act as natural scavengers as they dispose off the dead bodies, organic wastes, release raw materials for reutilisation. They also help in sewage disposal, manure production etc. Symbiotic bacteria help in nitrogen fixation. Some bacteria arq employed in the production of a number of industrial products like lactic
\nacid, curd, cheese, butter, vinegar etc. Some bacteria are used in preparation of serum, vaccines, vitamins, enzymes, antibiotics etc. e.g., Pseudomonas, Xanthomonas, etc.
\n(b) Archaebacteria : Archaebacteria are employed in the production of gobar gas from dung and sewage and in ruminants, they cause fermentation of cellulose.<\/p>\n

More Resources for CBSE Class 11<\/strong><\/p>\n