In this essay we will discuss about the fossil records of different geological strata. Essay # 1. Fossil Records of Pre-Cambrian Era: The Pre-Cambrian includes approximately 90% of the geologic time which covers approximately 4,200 million years (m.y.) of the earth history (Table 1.2). The Pre-Cambrian world was almost certainly as diverse and complex a place as today's world. Most [...]
In this essay we will discuss about the types of pollination. Essay # 1. Self-Pollination or Homogamy or Autogamy: When the pollen grains are transferred from an anther to the stigma of the same flower, the process is called self-pollination. viz. Commelina benghalensis of Commelinaceae, Argemone mexicana of Papaveraceae, Mirabilis jalapa of Nyctaginaceae etc. [On the other hand, the process [...]
In this essay we will discuss about the nomenclature of plants. After reading this essay you will learn about:- 1. Meaning of Nomenclature 2. Types of Nomenclature 3. Rules. Essay # 1. Meaning of Nomenclature: The nomenclature may be defined simply as the system of naming of plants. After determination of a new taxon based on some important characteristics, it [...]