THE LIFE CYCLE

THE LIFE CYCLE

1.1-REPRODUCTION

     All living organism produce new individuals of the same spices, that is a new generation of the spices from an existing individual. this fundamental characteristic of living thing is known as reproduction.

     Reproduction is necessary to maintain the number of individuals of a species and to prevent their extinction. 

     organism belonging to the same spices look similar to each other and create new individuals that look like themselves. A basic process in reproduction is the creation of DNA copy. cells use chemical reaction to create a DNA. in this process of copying, some variation take place each time. thus DNA copies generated are similar but not identical to the original.
    
            

                 

THE IMPORTANT IN VARIATION

changes in ecological system, which are beyond our control like varying temperature, varying water level can wipe out a spices. but, if variation in some individual are suitable for new environment, there is chance of survival of that spices.

MODE OF REPRODUCTION

        Two main modes of reproduction are asexual reproduction and sexual reproduction.

ASEXUAL REPRODUCTION

Asexual reproduction is a mode of reproduction by which offspring arise from a single organism, and inherit the genes of that parent only; it is reproduction which almost never involves ploidy or reduction.
                                       
                                        

                                                 


      CLONING
In biology, cloning is the process of producing similar populations of genetically identical individuals that occurs in nature when organisms such asbacteria, insects or plants reproduce asexually. Cloning in biotechnology refers to processes used to create copies of DNA fragments (molecular cloning), cells (cell cloning), or organisms. The term also refers to the production of multiple copies of a product such as digital media or software.
The term clone is derived from the Ancient Greek word κλών (klōn, “twig”), referring to the process whereby a new plant can be created from a twig. Inhorticulture, the spelling clon was used until the twentieth century; the final e came into use to indicate the vowel is a "long o" instead of a "short o".^[1][2]Since the term entered the popular lexicon in a more general context, the spelling clone has been used exclusively.
In botany, the term lusus was traditionally used.^[
In the United States, the human consumption of meat and other products from cloned animals was approved by the FDA on December 28, 2006, with no special labeling required because food from cloned organisms has been found to be identical to the organisms from which they were cloned.^[4] Such practice has met strong resistance in other regions due to misinformation,^[5] such as Europe, particularly over the labeling issue


    SEXUAL REPRODUCTION
Sexual reproduction is a process that creates a new organism by combining the genetic material of two organisms. 


REPRODUCTION IN HUMAN BEING


Human reproduction is any form of sexual reproduction resulting in the conception of a child, typically involving sexual intercourse between a man and a woman. During sexual intercourse, the interaction between the male and female reproductive systems results in fertilization of the woman's ovum by the man's sperm, which after a gestation period is followed by childbirth. The fertilization of the ovum may nowadays be achieved by artificial insemination methods, which do not involve sexual intercourse.
                


  
MALE & FEMALE REPRODUCTIVE SYSTEM