Description
Our living world is fascinatingly diverse and amazingly complex. We can try to understand its complexity by investigating processes at various levels of biological organisation–macromolecules, cells, tissues, organs, individual organisms, population, communities, ecosystems and biomes. At any level of biological organisation we can ask two types of questions – for example, when we hear the bulbul singing early morning
in the garden, we may ask – ‘How does the bird sing?’ Or, ‘Why does the bird sing ?’ The ‘how-type’ questions seek the mechanism behind the process while the ‘why- type’ questions seek the significance of the process. For the first question in our example, the answer might be in terms of the operation of the voice box and the vibrating bone in the bird, whereas for the second question the answer may lie in the bird’s need to communicate with its mate during breeding season. When you observe nature around you with a scientific frame of mind you will certainly come up with many interesting questions of both types - Why are night-blooming flowers generally white?
How does the bee know which flower has nectar? Why does cactus have so many thorns? How does the chick spures recognise her own mother ?, and so on.
Organisms : Organisms form the basic unit of study in ecology. Organisms with similar features and the potential interbreed among themselves and produce fertile offspring, constitute a species
Populations : Population is a group of individuals of the same species, inhabiting in a given area. Interspecific competition for basic needs operate among the individuals of a population.
Ecology is basically concerned with four levels of biological organisation – organisms, populations, communities and biomes.
Course Content
Introduction
Major Abiotic Factors Part-1
Major Abiotic Factors Part-2
Response to abiotic factors
Conformation
Population Attributes
Population attributes - Age pyramid
Population Growth
Growth Model : Exponential growth
Growth Model : Logistic growth
Population & Ecological adaptations
Population Interactions
Predation
Commensalism
Competition
parasitism
Mutualism
Response to abiotic factors (Reshoot)
