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.
jagranjosh.com: CBSE Class 12 Biology Study Material for Board Exam 2026: Check for Complete Guide Here
CBSE Class 12 Biology Study Material for Board Exam 2026: Check for Complete Guide Here
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
Biology in essence is the story of life on earth. While individual organisms die without fail, species continue to live through millions of years unless threatened by natural or anthropogenic extinction. Reproduction becomes a vital process without which species cannot survive for long. Each individual leaves its progeny by asexual or sexual means. Sexual mode of reproduction enables creation ...