వృక్ష శాస్త్రము

వృక్ష శాస్త్రము

UNIT-V
 Life, Bio molecules, Cell cycle and Cell division
 This unit is a different approach to the study of organisms compared to the earlier one in previous chapters. In the earlier chapters morphological features were described. Study of internal character started in the later sixteenth century after the constitution of the microscopes by Antonvon Leewenhoek.
 *    The first chapter is about the fundamental aspects of the cytology and cell organelles. All the aspects of the cell organelles were described very briefly.
 *    In the beginning of the chapter external and internal structural details of the prokaryotes are described. Student should club this topic with the Kingdom Monera of the chapter 2.
 *    Both of these should be clubbed with the second year Unit-II (Micro biology) by the second year and long term students. In the study of prokaryotes external and internal characters should not be separated.
 *    In different chapters different and new information is given. Unless students complete the second year Micro biology he/she will not get total information.
 *    Long term students also face this problem. Each time, as they are completing the syllabus, new information is emerging regarding the same prokaryotes.
 *    As the syllabus is new to them it is advisable for the long term students to study all these chapters at a stretch.
 *    In the chapter 2nd a mention is made about mesosome of bacteria and its functions are written in the chapter 9 and mention is not made in the Microbiology where actually it should have made.
 *    Same thing is regarding plasmid, flagella, pili, fimbriae, capsule, slime layer and staining of bacteria. Scope of objective type of questions from this information is very high.
 
 Description of the cell organelles is very brief Cytology is an inter disciplinary topic. In EAMCET examinations Botany and Zoology will be treated as two separate subjects.
 *    In the 9th chapter much information is there about animal cells.
 *    Cell wall is described briefly and no mention is made about protoplasm. Functions of the plasma membrane is elaborated here describing about the active transport and passive transport.
 *    It is just the summary of the first chapter of the second year Botany.
 *    Structure of the cilia and flagella, centrosome and centrioles is out of the scope of the botany text book.
 *    It is a repetition of the information given in the zoology text book.
 *    With its brief nature difficult questions for EAMCET are not possible from this chapter.
 *    For the long term students there is no much additional information to learn.
 *    Names of the scientists are also very few in the new syllabus. It is a disadvantage for the students who opt for life sciences in the graduation as cytology and cell organelles are not going to be studied again separately after intermediate.
 *    Biomolecules chapter is a new addition to the life sciences.