Edusaint

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...

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...

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 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...

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...

ANIMALIA Porifera These are non-motile organisms with pores all over their body leading to canal system that helps in circulating water throughout the body to bring in food and oxygen. These animals are covered...

Classification is the Science of arranging organisms in series of groups and subgroups on the basis of their similarities and dissimilarities. Aristotle classified organisms on the basis of their habitat means the place...

ANIMAL TISSUES Epithelial tissue The covering or protective tissue in animal body are epithelial tissue, covering most organs and cavities it forms a barrier to keep different body systems separate. The skin, the lining of...

What is Tissue Tissue is a group of cells that are similar in structure and/or work together to achieve a particular function. Eg :- In human beings the cells of the muscular tissue contract...

Cell Structure and Function Cell is the fundamental and structural unit of life. All living organisms are composed of cells. Amoeba, chlamydomonas, paramoecium and bacteria are unicellular organism. In multicellular organisms, many cell group...