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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...

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...

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...

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...

Resource and Development :NCERT Geography Notes for Class 10th

Resource and Development A resource is a source or supply from which a benefit is produced Everything available in our environment which can be used to satisfy our needs, provided, it's technologically accessible(may be...

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...

Mineral and Energy Resources:Conventional and Non Conventional Sources of Energy

Conservation of Minerals We are dependent on minerals for the development We are rapidly consuming mineral resources that required millions of years to be created and concentrated. Continued extraction of ores leads to increasing...

Mineral and Energy Resources :NCERT Geography Lesson For class 10th

Mineral : A homogenous, naturally occurring substance with a definable internal structure. They are found in varied forms in nature. Rocks are combinations of minerals. A particular mineral that formed from a certain combination...

Water Resources: NCERT Notes For Class 10th Geography

How do we get Fresh Water The three-fourth of the earth’s surface is covered with water. But only a small proportion of it accounts for freshwater that can be put to use. This freshwater...