Origin of Life :- It is the natural process by which life has arisen from nonliving matter such as inorganic compounds. The life originated in the primitive Ocean on the Earth. As the distance from Sun increased, cooling process started. it resulted into the differentiation of regions – 1. Crust :- It is a outermost […]
Population :- A population may be defined as a group of organisms of the same species occupying a certain area or space at a given time . population Attributes :- A population has certain attributes that and individual organism does not . An individual may have births and deaths , but a population has birth
Biodiversity :- Biodiversity is the term popularised by the sociologist Edward Wilson to describe the combined diversity at all the levels of biological organisation . The most important of biodiversity are – 1 . Genetic diversity :- A Single species might show high diversity at the genetic level over its distributional range . The genetic
Ecosystem :- An Ecosystem can be visualised as a functional unit of nature , where living organisms interact among themselves and also with the surrounding physical environment . Components of an Ecosystem :- 1 . Biotic components . 2 . Abiotic components . Biotic components :- Biotic components are living things that shapes an Ecosystem
Ecosystem , Trophic levels , Productivity , Nutrient Cycling Read Post »
Microbes in Human Welfare :- Microbes are the major components of biological Systems on this earth . Microbes like bacteria and many fungi can be grown on nutritive media to form colonies , that can be seen with the naked eyes . Such culture are useful in studies on micro-organisms . Microbes causes disease in
Applications of Biotechnology :- Applications of Biotechnology in – 1 . Alcohol production . 2 . Dairy products formation . 3 . Organic acids formation . 4 . Enzymes production . 5 . Vitamins production . 6 . Antibiotics production . 7 . Vaccines production . 8 . Hormones production . 9 . Recombinant DNA
Biotechnology :- Biotechnology is recent branch of biology . Biotechnology deals with the techniques of using live organisms or enzymes from organisms to produce products and processes useful to humans . Principles of Biotechnology :- The two techniques are used for the development of modern Biotechnology . ( 1 ) Genetic Engineering :- This techniques
Fertilization in Humans :- The Fertilization process was first study by Lillie in Echinoderms . Fertilization is the process in which male gamete and female gamete fuse together . In human being Fertilization takes place Fallopian tube between the two dissimilar gametes of the same Species . Fertilization may be external ( out side the
Fertilization in Humans , Development of Embryo in Humans Read Post »
Human Reproduction :- Human beings are nonseasonal breeders ,there is no Oestrus / heat . Male Reproductive System :- In human reproduction , The male Reproductive System Consists of paired testes , Several Accessory glands , a duct System and a mating Organ called the penis . Scrotum :- In man , both testes normally
Human Reproduction and Human Reproductive System Read Post »
Development of Embryo in Flowering Plants :- Development of Embryo in Flowering Plants occur at the micropylar end of the embryo sac where the zygote is situated . Endosperm :- During the development of Embryo in Flowering Plants the primary endosperm cell divides repeatedly and form a triploid Endosperm tissue .The cells of this tissue
Structure of Flower :- A Flower is the Sexual Reproductive Organ in Plants. Flowers are often the most attractive structures of plant. Calyx :- These are green Petal like structure that are found in right above the base of the flower called Receptacles. Corolla :- It is the collective name given to the petals which
Sexual Reproduction :- Sexual reproduction occurs when the sperm from the male parent fertilizes an egg from the female parent, producing an offspring that is genetically different from their parents. The Stages of Sexual Reproduction :- 1. Pre – fertilization :- This stage involves the events prior to fertilization. Gamete formation ( Gametogenesis ) and
Sexual Reproduction : Stages and It’s Advantages Read Post »
