Human Reproduction - CBSE Notes for Class 12 Biology CBSE NotesCBSE Notes BiologyNCERT Solutions Biology 1. Humans are sexually reproducing and viviparous organisms. There are remarkable differences between the reproductive events and systems in male and female. 2. Male reproductive system includes a pair of testes, accessory ducts, glands and the external genitalia. (i) … [Read more...]

Biodiversity and Conservation - CBSE Notes for Class 12 Biology CBSE NotesCBSE Notes BiologyNCERT Solutions Biology Biodiversity: 1. Biodiversity can be defined as the occurrence of different types of genes, gene pools, species, habitats and ecosystem in a given region. (i) The term biodiversity was given by a socio biologist Edward Wilson to describe the combined … [Read more...]

Environmental Issues - CBSE Notes for Class 12 Biology ​NCERT SolutionsMathsPhysicsChemistryBiologyScience​ Pollution, Solid and Radioactive Wastes: 1. Pollution is an undesirable change'in the physical, chemical and biological characteristics of air, water, land and soil. (i) Pollutants are agents that cause undesirable change in the environment. (ii) The Government of … [Read more...]

Organisms and Populations- CBSE Notes for Class 12 Biology CBSE NotesCBSE Notes BiologyNCERT Solutions Biology Organisms and Its Environment: 1. Ecology is the branch of biology, which studies the interactions among organisms and their physical (abiotic) environment. 2. The subject ecology is basically concerned with four levels of biological organisation. These are … [Read more...]

Ecosystem - CBSE Notes for Class 12 Biology ​NCERT SolutionsMathsPhysicsChemistryBiologyScience​ Ecosystem—Structure and Function,- Productivity and Decomposition: 1. An ecosystem is a functional unit of nature, where living organisms interact among themselves and also with the surrounding physical environment. The word ‘Ecosystem’ was coined by Sir AG Tansley (1935). 2. … [Read more...]