Heredity, Its Physical Basis and Variations
Some specific characters are found in the parents of each species. These characters are transferred from generation to generation through the process of sexual reproduction.
sexual reproduction
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Sexual Reproduction in Animals
Great diversities are found in terms of sexual reproduction among animals.
Sexual Reproduction in Plants
Sex organs of plants are found inside flowers. A male reproductive organ is called as Androecium and a female sex organ is called as Gynoecium.
Origin and Characteristics of a Family
The early man started his life as an individual. Gradually he came in contact with his fellows and he started developing a social life. At any period of human life it is hard to understand that a man ever remained in isolation. Thus this hypothesis does not cover the whole thing.
Natural Resources and Their Types
Natural resources constitute both living and non-living resources. Non-living resources are renewable and non-renewable.
Terrestrial Ecosystems and Their Components
The biosphere is itself a vast ecosystem which incorporates all the small ecosystems. But, the biosphere may have different types of physical conditions, communities of plants and animals, and climatic conditions in its different zones.
How do Organisms get Their Food?
Mode of nutrition through which an organism depends on other organisms for food due to its inability to synthesise food is called as heterotrophic nutrition.
Food Production from Animals
The government have initiated a number of measures to increase the productivity of milch animals. It has resulted in an increase in the milk production significantly from the level of 102.6 million tonnes at the end of the tenth plan (2006 -2007) to 127.9 million tonnes at the end of the Eleventh plan (2011 -2012. The Annual Growth Rate of milk production was about 5% in 2011 -12 compared to 2010 -11.
Interactions between members of a species
Living beings interact among themselves in the same species, with the members of the other species, and with the components of the abiotic environment in an ecosystem. Interaction between the members of the same species is called as Intraspecific whereas the interaction among individuals of different species is called as Interspecific.
Factors Causing Population Change
There are four basic factors that cause population change in a country – Natality or the birth rate, Mortality or…
Renewable Energy
Anything from which we can derive energy is called as a source of energy. Since all the life processes need energy, energy is most important for our survival. Our body derives energy from the food we eat. Thus, the food we eat is the source of energy for our body. But this is not the whole story. We need energy for our growth and economic development as well.
