Nucleus Class 9 in Pashto | Structure and Functions of Nucleus | Nucleolus | Sabar Khan Lectures скачать в хорошем качестве

Nucleus Class 9 in Pashto | Structure and Functions of Nucleus | Nucleolus | Sabar Khan Lectures

this video lecture is about the Nucleus which is an important topic of class 9 Biology chapter 4 Cells and Tissues. Definition: most important and visible part of eukaryotic cell. Shape: spherical or irregular. Presence: nucleus is present in eukaryotic cells. Absent in: Prokaryotes (Bacteria). Discovery of Nucleus: Robert Brown in 1831 in plant cell. Number: Nucleus may be one or more per cell. Position: in animal cell, nucleus is in center while in plants it is towards side. Diagram: neat and clean diagram is drawn on white board. Structure of nucleus: Nucleus consists of the following parts. nuclear membrane nucleoplasm nucleolus chromosomes Functions of nucleus: controls all the activities of the cell. contains hereditary material. transcription and replication. ribosomes synthesis. nuclear pores for exchange. Other names of the nucleus: control center of the cell. brain of the cell All the above points about the Nucleus have been discussed and explained by Sabar khan in Pashto language with detail and diagramatic representation. Key Words: nucleus discovery structure function nucleolus chromosomes class 9th biology #WhatisNucleus #NucleusClass9 #StructureandFunctionsofNucleus #SabarKhanLectures