It is the homogeneous mixtures of two or more than two components . When the composition and properties are uniform throughout the mixture then it is called homogeneous mixture . It has following components – Solvent :- The component that present in the largest quantity is known as Solvent . Solvent can be solid , […]
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 »
Reproduction :- Reproduction is the biological process by which new individual organisms ( offsprings ) are produced from their parents. It is a fundamental features of all known life. Types of Reproduction :- There are of mainly two types. – Asexual Reproduction :- It is the biological process in which an organism can reproduce without
Magnetic properties of Crystals :- Each electron in an atom behaves like a magnet. It’s magnetic moment originates from two types of motions are orbital motion around the nucleus and spin around its own axis. Magnitude of magnetic moment is very small and is measured in the unit called Bohr magneton μB. It is equal
Conductors:- The solids with conductivities ranging between 10⁴ to 10⁷ ohm⁻¹ m⁻¹ are called conductors. Examples. – Metals like Iron, Copper, Sodium etc. Insulators :- Semiconductors :- These are the solids with conductivities in the intermediate range from 10⁻⁶ to 10⁴ ohm⁻¹ m⁻¹· Examples. – Silicon and Germenium shows this behaviour called intrinsic semiconductor. Types
A solid consists of an aggregation of large number of small crystals, these small crystals have defects in them which are called defects in crystals. The defects in crystals are basically irregularities in the arrangement of constituent particles. Types of defects in crystals :- The defects in crystals are of mainly two types:- ( a
Atomic radius :- Thus, the edge length or side of the cube a and the atomic radius of each particle r are related as a = 2 r r = a / 2 In ∆ EFD, b² = a² + a² = 2a b = √2 a Now in ∆ AFD c² = a² +
Atomic radius, Packing fraction and Empty space in the Close Packing Read Post »
In Crystals, the constituent particles are close packed and leaving the minimum vacant space. In such a situation, the entropy of crystalline material becomes minimum. Let us consider the constituent particles as identical hard spheres and build up three dimensional structure in following three steps – Close Packing in one Dimension :- There is only
