In this essay we will discuss about the process of dispersal of fruits and seeds. Dispersal is the phenomenon of transferring of plant parts to distant place. Dispersal of fruits and seeds are common in angiosperms. It has great importance in their life process. The dispersal is essential because of the following facts: 1. If all the fruits and seeds [...]
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 [...]