Jagran Josh Logo
  1. Home
  2.  |  
  3. Science
  4.  |  
  5. Biology

General Knowledge for Competitive Exams

Read: General Knowledge | General Knowledge Lists | Overview of India | Countries of World

10 interesting facts about Human Brain

2 days ago

Brain is located inside the skull of the head and is protected by a bony structure in the skull called cranium. It is the command center of the nervous system. It receives input from the sensory organs and sends output to the muscles. This article deals with some interesting facts about the brain, which may be you don’t have studied till now.

Do you know which Human Body Organs can be donated

Apr 18, 2017

The organ system functions according to the particular organ like digestive system; it processes the food, etc. Organism’s survival depends upon the integrated activity of the organs and organ system with that of endocrine and nervous system. This article deals about the list of human body organs and tissue that can be donated and the criteria of their donation.

What is Green Muffler and how it is related with pollution

Mar 14, 2017

Green Muffler is a technique of reducing noise pollution by planting 4-6 rows around the populated areas or noisy places. Let us find out what is Green Muffler Scheme, why trees are known as buffers, how trees help in reducing noise pollution.

What is the difference between DNA and RNA

Feb 6, 2017

DNA is a deoxyribonucleic acid and is a hereditary material whereas RNA is ribonucleic acid present in all living cells. Both DNA and RNA is important, if either one of these polymers fails or disappear then life would cease to exist. Without these elements protein will not be able to generate which is important for life to exist and to produce energy.

World’s first stable semi-synthetic organism discovered

Jan 27, 2017

TSRI Scientists have discovered world’s first stable semi-synthetic organism that may be helpful in the discovery of various drugs or medicines. Here we have discussed about this single celled bacterium and also the structure and function of DNA how it works and how hereditary characteristics features travels from one generation to another.

List of Scientific Names of Animals and Birds

Nov 25, 2016

Classification of animals and birds name is also known as 'binomial nomenclature'. In 1973 Carl Linnaeus, classified species into two names, one is genus and other is a specific name. Like Homo sapiens, which stands for humans. In this homo is genus and sapiens is a specific name. In this article list of some animals and birds are provided with their scientific names which will not only enhance your knowledge but also help in your various examination preparations.

Human Skeletal System: Structure|Functions|Diseases

Nov 18, 2016

The Skeleton System provides the hard structure or framework to the human body which support and protects the body. It is composed of connective tissues like bones, cartilage, tendons and ligaments. In this article we will study its structure, functions, disorders of bones and also various types of joints.

List of important Antibiotics, its Source and Action

Oct 10, 2016

Antibiotics are introduced in 1940s and 1950s. They are medicines which are used to treat infections or diseases. Or we can say that it is a type of medication that destroys or slows down the growth of bacteria.

Organ Systems of Human Body

Sep 15, 2016

Organ system is a group of organs that work with one another in order to perform a particular task or set of tasks. These organs have specific functions but cannot function independently of one another. Various organ systems of the Human Body are discussed in this article which not only enhance your knowledge and ease your exam preparation but also help to understand the phenomena of our body.

Specific Branches of Biology: Complete List

Jun 30, 2016

Biology is a natural science in which we study about the life of living organisms consisting of various functions, structure, evolution, taxonomy etc. and is composed of many branches through which the scope of biology is broadened with the unifying concepts that govern all study and research which is consolidated into a single and coherent field.

Biological Science: List of Inventions and Discoveries

Jun 30, 2016

In contemporary world there have been undergone tremendous expansions of Biological Sciences such as Cell Biology, Neuroscience and Evolutionary Biology through the advancement of various inventions and discoveries that not only improved the quality of living but also increases life expectancy.

“General Science” A Complete Study Material

Jun 6, 2016

The Complete Study Material of “General Science” i.e. Physics, Chemistry and Biology is given in a compiled form that will be very helpful for the students of 6th to 12th class, undergraduates and those who are preparing for competitive exams familiar with the diversity of the subject and make them understand the concepts.

Various Glands and Hormones in Human Body

Jun 6, 2016

There are some special tissues in our body called endocrine glands that secrete chemical substances called hormones. These hormones help in coordinating the activities of living organisms and their growth.

Human Reproductive System: Female

Jun 6, 2016

The ovaries in the Human Female Reproductive System produce eggs which meet with sperms in oviducts. It is here that the egg gets fertilised. After fertilisation this egg goes into the uterus and further grows and develops into a baby.

Control and Coordination in Humans

Apr 5, 2016

The nervous system helps in controlling and coordinating various activities of the human body. The three types of nerves, cranial nerves, spinal nerves and visceral nerves run through the body and help in sending and receiving messages in the form of electrical impulses.

Nuclear fission and nuclear fusion

Mar 23, 2016

Nuclear fission and nuclear fusion are two types of nuclear reactions. Fission means to split and fusion means to combine. Therefore in fission reaction a heavy nucleus of atom is bombarded so that it splits and in fusion reaction two lighter nuclei are heated at high temperature so that they combine to form a heavy nucleus.

Mode of Nutrition in Animals

Mar 18, 2016

Nutrition is the process of taking food and using it for obtaining energy, growth and repair of the body Animals depend on other animals or plant for food. They either eat plants or animals or both to fulfil their nutritional needs.

Mode of Nutrition in Plants

Mar 17, 2016

Plants make their own food in the presence of sunlight and hence they are autotrophs. Plants convert sunlight energy into chemical energy. They use carbon dioxide, water and sunlight to make their own food in the presence of chlorophyll.

Human Reproductive System: Male

Mar 14, 2016

The humans use sexual mode of reproduction. The reproductive systems in human beings become functional or start functioning at a definite age called puberty. In complex multicellular organisms like human beings there are special reproductive organs to make sperms and eggs; to bring together sperms and eggs for fertilization; and for the growth and development of zygote in to a baby.

Sexual Reproduction in Animals

Mar 14, 2016

Sexual reproduction is the production of a new organism from two parents by making use of their sex cells or gametes. In this process male gametes fuses with a female gamete to form a new cell called ‘zygote’. This zygote then grows and develops in to a new organism in due course of time. Sometimes sex cells or gametes are also called as germ cells. The humans, fish, frogs, cats, dogs etc. all reproduce by the method of sexual reproduction.

Sexual Reproduction in Flowering Plants

Mar 11, 2016

Sexual reproduction is the production of a new organism from two parents by making use of their gametes or sex cells. Plants also have male and female sex organs. When the male gamete combines with the female gamete, a new seed is formed. This seed when provided with suitable environment is germinated and a new plant is grown.

Asexual Reproduction in Plants

Mar 11, 2016

Asexual reproduction is a process in which new organism is produced from a single parent without the involvement of gametes or sex cells. Many unicellular and multicellular organisms reproduce asexually. In this process, parent organism either splits or a part of parent organism separates to form a new organism. There are six types of asexual reproduction and it is important to know how unicellular and multicellular organisms reproduce asexually.

Control and Coordination in Plants

Mar 11, 2016

Plants also show movement by growth of their various parts. It is the plant hormones that promote its growth. The movement of plant parts is due to various stimuli like gravity, water, light, chemical, touch, etc. So, the function of control and coordination in plants is performed by the chemical substances called plant hormones or phytohormones.

Excretory System in Humans

Mar 9, 2016

Excretion is the process of removal of toxic wastes from the body of an organism. The major wastes produced by us are: Carbon dioxide and Urea. Carbon dioxide is produced by the process of respiration and urea is produced by the decomposition of unused proteins in the liver. There are different organs which removes waste from the body. These are lungs and kidneys. Our lungs excrete carbon dioxide and kidneys urea.

Transport system in plants

Mar 4, 2016

Transport in biology means carrying substance absorbed or made in the body of an organism to all other parts of its body. In plants, it is only water and minerals that need to be transported to its other parts. Another thing that needs to be transported to other parts of the plants is the food prepared in leaves. So, for this plants need transport system in their body to supply all their cells with food, oxygen, water etc.

Respiration and Excretion in plants

Mar 4, 2016

Respiration is the process of releasing energy from food and excretion is the removal of waste from the body. Plants also undergo the process of respiration and excretion. During respiration there is a gaseous exchange of respiratory gases and in excretion various kinds of plant waste is removed through different methods. So, it is important to know how gaseous exchange of respiratory gases takes place in a plant.

Human Circulatory System

Mar 3, 2016

The Circulatory System is the system of organs in the human beings and other animals which is responsible for transport of materials inside the body. It consists of heart, arteries, veins, capillaries and blood. The heart acts as a pump to push out blood. The arteries, veins and capillaries act as pipes or tubes through which the blood flows.

Composition and Functions of Blood

Mar 1, 2016

Blood is a red coloured liquid which circulates in our body. It is red in colour because it contains a red pigment called haemoglobin in its red cells. Blood is a connective tissue, it consists of four things namely Plasma, Red blood corpuscles (Red blood cells or RBCs), White blood corpuscles (White blood cells or WBCs) and platelets. Blood helps in transportation of substances, protect against diseases and regulates body temperature.

Respiratory System in Humans

Feb 26, 2016

Respiration is the process by which energy is released from food in our body. The function of respiratory system is to breathe in oxygen for respiration producing energy from food, and to breathe out carbon dioxide produced by respiration. With the help of lungs gases are exchanged between the blood and the air. Gases exchanged are oxygen and carbon dioxide.

Respiration in Animals

Feb 24, 2016

Respiration is the process of releasing energy from food and this takes place inside the cells of the body. The process of respiration involves taking in oxygen (of air) into cells, using it for releasing energy by burning food, and then eliminating the waste products (carbon dioxide and water) from the body. Respiration is essential for life because it provides energy for carrying out all the life processes which are necessary to keep the organisms alive.

12 Next   

Register to get FREE updates

    All Fields Mandatory
  • (Ex:9123456789)
  • Please Select Your Interest
  • Please specify

  • By clicking on Submit button, you agree to our terms of use
  • A verifcation code has been sent to
    your mobile number

    Please enter the verification code below

Latest Videos

Newsletter Signup
Follow us on