Sex Determination In Human Beings Explained

Sex Determination in Human Beings  A person can have a male sex or a female sex. The process by which the sex of a person is determined is called sex determination. Genetics is involved...

Structure and Interior of the Earth NCERT Notes on Geography

Interior of the Earth   The internal structure of the earth is layered. The Earth is generally divided into four major layers: the crust, mantle, inner core, and outer core. Earth’s crust is the outermost...

Heredity Evolution,Speciation Notes on Science For Class 10th

Sex determination in human beings Human beings have 23 pairs of chromosomes in the nucleus of the cell. Out of this two chromosomes are sex chromosomes X and Y. The female has two X...

Heredity And Evolution : Class 10 Notes on NCERT

ACCUMULATION OF VARIATION DURING REPRODUCTION Heredity :- The process of transfer of characters or traits from the parents to their offsprings is called heredity. Variations :- The differences between the characters or traits among...

Sexual Reproduction in Human Beings : Study Notes for Class 10th Science

Reproduction in human beings Puberty-it is the period during which adolescents reach sexual maturity and become capable of reproduction During early teenage whole new set of changes occurs, appearance of body and proportions change...

Sexual Reproduction in Plants : Science Notes for Class 10 Biology

SEXUAL REPRODUCTION In a population variations are useful for survival of a population. Sexual mode of reproduction allows individuals to have more variations to be generated. Generation of variations in DNA copying mechanism of...

How do Organism Reproduce:Class 10th Science Notes on Biology

Reproduction  Reproduction is defined as a biological process in which an organism gives rise to young ones (offspring) similar to itself. Reproduction at its basic level involves creation of the copy of DNA DNA...

Airways and Communication :Life Line Of National Economy .NCERT Notes in Geography

Airways The world’s first air-mail service was started in India at Allahabad; on 18th Feb 1911 on  the occasion of Kumbh mela Regular airmail services were started by Tata Sons Ltd, between Karachi and...

Railways And Waterways :Lifelines of National Economy Geography Notes on NCERT

Railways Indian Railways is one of the largest PSU in the Country The Indian Railways route length network is spread over 115,000 km, with 12,617 passenger trains and 7,421 freight trains each day from...

Life Line of National Economy : Geography Notes for Class 10th NCERT

Lifelines of National Economy Goods and services are transported using three modes of transport. According to the medium , transport can be classified into land water and air transport. Means of Transport Land Roadways Railways Pipelines 2. Water Inland and...