SUMMARY As a branch of biology, Ecology is the study of the relationships of living organisms with the abiotic (physico-chemical factors) and biotic components (other species) of their environment. It is concerned with four levels of biological organisation-organisms, populations, communities and biomes.
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Biology is the story of life on earth. Biology is the story of evolution of living organisms on earth. All living organisms – present, past and future, are linked to one another by the sharing of the common genetic material, but to varying degrees.
Chapter 04 of Biology ncert book titled - Animal kingdom for class 11
Chapter 02 of Biology ncert book titled - Biological classification for class 11
Before experimental biology or more specifically, physiology, was established as a part of biology, naturalists described only biology. Hence, biology remained as a natural history for a long time. The description, by itself, was amazing in terms of detail.
Chapter 07 of Biology ncert book titled - Structural organisation in animals for class 11
Chapter 18 of Biology ncert book titled - Body fluids and circulation for class 11