In this essay we will discuss about the life cycle of Pinus, explained with the help of suitable diagrams. Sporophyte of Pinus: Pinus is a tall evergreen tree giving rise to a series of widespread horizontal branches (Fig. 1.57A). In each year, a whorl of branches is produced in the axil of scale leaves. The branching is restricted to the [...]
Read this essay to learn about:- 1. Origin and Distribution of Collenchyma Tissue 2. Cell Structure 3. Functions. Essay # 1. Origin and Distribution of Collenchyma Tissue: Ontogenetically, collenchyma cells develop from certain elongated cells resembling procambium which are formed in the very early stages of differentiation of the meristem. Sometimes less specialised collenchyma originates from the ground meristem. Some [...]
In this essay we will discuss about the basic and applied aspects of studying fossil plants. Essay # 1. Basic Aspect of Studying Fossil Plants: Such studies help us to understand the past vegetation, climate and palaeoecology including the history of plant evolution, biostratigraphy, etc. Some of the important basic aspects of such application are: (a) To Decipher Palaeovegetation and [...]