Biology

Biology-Introduction

Biology: Branch of science in which scientific study of life is done. Bios = Life and Logos = Study. Therefore study of life is called Biology. The term biology was first coined by Lamarck and Treviranus in the year 1801. Biology has two mai

examguru by ExamGuru

What is Living

The word living cannot be defined. Living organism mostly uses solar energy. There are certain characters by which living can be distinguished from non living. 1. Growth: Increase in the number of cell or mass is called growth. 2. Reproduc

examguru by ExamGuru

Classification of Organism

There are millions of organisms. It is impossible to study each individual separately. Classification means to categories organism into different groups. Study o fan individual of a group gives us the idea of rest of the member of that group. Li

examguru by ExamGuru

Study of Cell - Cytology

Study of cell is called cytology. Cell-Cytology, Main features & function, Types of cell, Plant cell, Animal cell, Cell structure, Protoplasm, Cell membrane, Chromosome, DNA, RNA, Protoplasm, Lysosome, Mitochondrea, Mytosis Cell:

examguru by ExamGuru

Genetics

Transmission of character from one generation to next generation is called heredity. The process of transfer of hereditary character from generation to generation is called genetics. The name genetics was first coined by W. Wattson in 1905.

examguru by ExamGuru

Sex Determination in Human

In human male sex chromosome is ‘XY’, where as in female sex chromosome is XX. During gamete formation in male half of the sperm contain ‘X’ chromosome while other half contain ‘Y’ Chromosome. In female all gametes

examguru by ExamGuru

Organic Evolution

More and more creation of organism by gradual change from low categories organism to higher organism is called organic evolution. There are several evidence regarding organic evolution. Homologous organ: Organ which are seen different due to us

examguru by ExamGuru

Botany

Classification of Plantae / Virus & Bacteria

The study of different types of trees & plants is called Botany. Theophrastus is called the father of Botany. Aristotle is known as father of biology. In the year 1883, Eicher has classified the Botanical world as under: 1. Cryptoga

examguru by ExamGuru

Plant Morphology

Morphology: The study of forms and features of different parts of plants like roots, stems, leaves, flowers, fruits etc is called Morphology. Root Root is the descending part of the plant which develops from redicle. Root hairs arises f

examguru by ExamGuru

Plant Tissue

Tissue: The group of cells having common origin, and usually perform a common function. Types of plant tissue A. Meristematic tissue: Growing regions of the plants are called Meristem. Meristematic tissue have capability of cell divis

examguru by ExamGuru

Photosynthesis

Photosynthesis is a process in which green plant syntheses their food like glucose from carbondioxide and water in presence of sun light with the help of chlorophyll. Carbon dioxide, water, chlorophyll and sunlight are necessary for photos

examguru by ExamGuru

Plant Hormones

Following five hormones are found in plants – 1. Auxins: Auxins was discovered by Darwin in the year 1880. This is the hormone which controls the growth of plants. Its formation takes place in the apical parts of the plants. Its

examguru by ExamGuru

Plant Diseases

Viral Diseases: a. Mosaic disease of tobacco: In this disease leaves get shrinked and become small. The chlorophyll of leaves get destroyed. The factor of this disease is Tobacco Mosaic Virus (TMV) known as Bacteriophage. Control – Affec

examguru by ExamGuru

Ecology/ Nitrogen cycle

Study of inter relationship between living organisms and their environment. Environment include both biotic and abiotic factors. Various population of living in a definite geographical region is called Biotic Community. Ecosystem or Ecologic

examguru by ExamGuru

Pollution

Unwanted changes in the chemical and physical features of air, water and land (environment) that are dangerous to human and other organisms, their life conditions, industrial process and cultural achievements are called pollution. The types of pol

examguru by ExamGuru

Zoology

Classification of Animal Kingdom

Zoology: Scientific study of the structure, form and distribution of animals called Zoology. John Ray was the scientist who developed key for identification of animals. Animal kingdom of the world is divided into two sub-kingdoms – (A) Non C

examguru by ExamGuru

Animal Tissue

The animal tissues can be divided into the following categories – 1. Epithelial Tissue    2. Connective Tissue 3. Muscular Tissue    4. Nervous Tissue 1. Epithelial Tissue: Epithelial tissue cover the e

examguru by ExamGuru

Human Blood

Blood is a type of fluid connective tissue. The quantity of blood in the human’s body is Approximately 7 to 8% of the total weight of adult. This is a dissolution of base whose pH value is 7.4. There is an average of 5-6 litres of bloo

examguru by ExamGuru

System of the Human Body

(A) Digestive System The complete process of nutrition is divided into five stags : 1. Ingestion       2. Digestion  3. Absorption 4. Assimilation  5. Defecation 1. Ingestion: Taking the food into

examguru by ExamGuru

Nutrients

To maintain the life organisms performs some basic function is called nutrition. Nutrition is one of the basic function of life in which intake of food, digestion, absorption, assimilation and egestion of undigested foods are included. Nutrient:

examguru by ExamGuru

Biotechnology & Applied Biology

Biotechnology: It deal with techniques of using live organism or enzymes from organisms to produce product and processes which are useful for humans. Ex – making curd, bread or wine in which microbes are used. Genetic Engineering: Th

examguru by ExamGuru

Human Diseases

Diseases caused by Protozoa: S. Disease Affected organ Parasites Carrier Symptoms mosquito 1. Malaria RBC

examguru by ExamGuru

Medicinal Discoveries, Important information and Facts

Medicinal Discoveries Inventions/Discoveries Inventor/Discoverer Vitamin F.G. Hopkins, Cosimir Funk Vitamin-A Mc. Collum

examguru by ExamGuru