Type of document : Multivolume edition Edition cipher : 57/B60 Author(s) : Rama, Das, Mohan, Ram, Bhattacharva, Shakuntala, Rajendrudu G., Das, Debajyon Title : Biology: class XII : a Textbook for Senior Secondary Schools. Pt. I Outputed data : New Delhi: National Council of Educational Research and Training, 1989 Quantitative characteristics :762 с Price : 30.00 р. UDC : 57 + 57(075.3)=111 MeSH-main: БИОЛОГИЯ -- BIOLOGY Annotation: THE textbook in biology for Class XII is an outcome of the continuation of efforts to implement the National Policy on Education (1986). Part I contains two units—Multicelkilarity in Plants : Angiosperms’ and ’Multicellular in Animals’—covering Unit Five and Unit Six of the syllabus, respectively. Plants, fungi and animals have attained an organisational level in which cells have undergone differentiation and specialisation to develop into ’cellular cooperatives’ with a marked division of labour. The cells constituting tissues and the tissues constituting organs function with a remarkable harmony, in spite of retaining their individuality. Thus, multicellularity marks a new milestone in the evolutionary history of organisms. The diverse structures and the varied functions of the Kingdom Plantae as depicted by angiosperms have been dealt with in Unit Five. There are two reasons for selecting angiosperms: they are the most highly evolved among the land plants and they constitute the major resource base for human needs. An account of morphology, anatomy and physiology as exemplified by representative phyla in the Kingdom Animalia is given in Unit Six. A tremendous explosion of knowledge has occurred in biological sciences during the last four decades. Consequently it has become necessary to introduce several new concepts even at the secondary school level without sacrificing the basic aspects Copies :ІЛ(1) Free : ІЛ(1) Additional Access Points: Rama, Das Mohan, Ram Bhattacharva, Shakuntala Rajendrudu, G. Das, Debajyon