The science of reproduction

  The plants have two differents forms to reproduce one is whit flower and pollen and the other is by spores. Reproduction Whit flowers The pístil This is the female part of flower and have the pollen tube that conect whit the stigma of the flower and that connect wiht the exterior. The ovary that produce the ovule and the embrion sac that is where the zigote grows.   The stamen Is the male part of flower and have the pollen that makes that the ovule fertilizate and it need the help of other animal to make the pollen go to the stigma. 

 The endocrine system is enchareged to make some procces in the organisms. The subtances that produce are called hormones that are important to it.in reproduction the importants parts are the pitutary gland and the Hipotalamus that secret gonadotrophine and the pitutary gland secrets LH (Lutheus hormone) and FSH (Follicular Stimulate Hormone) that make that the ovulation in womens happen.    

The Cromosomes are the genetic information that are ubicated in a cell.  This are made whit proteins and Dna and there are a lot of differents chromosomes. All are different. How you can see the chromosomes is very rolled in itself. The Dna is rolled in the proteins.  All are different and are important because there are all of our information that indicates how make important procces like and important appearances like the color of eyes or the color of skin.  The Dna  The Dna is important to us. Have the information and our Dna at the most come of our father and mother thats the reason that we have characteristics of our parents. Some pairs are called genes. Have a form of double helix and is comformed by 4 important subtances Adenine, Thymine, Guanine and cytosine  and this four substances comform a the most the DNA  and at you can see in the representation the adedine only joins with the thymine and the same whit  the cytosine and the guanine. ...

The cells are the smalles't livin thing and it join one whit other  to make organisms and  are two types of  cells  Prokaryote   This cell is very simple and only bacterias and some unicellular  use this type of cell this don't  have nucleus  and only have some parts similar of the Eukariote. Funcions  The ribosomes: This are encharged in make synthesis of proteins.  Flagelum: Give movment to the organism that have it. Cell wall:This is encharged to protect more the cell and controll whar enter and leave the cell. Cytoplasm: This Hold the organelles and contribute his movement.  Nucleoid:This are the the Dna that are in the  Citoplasmatic membrane:This is also encharged of protect and controll the elementas tat go out and enter to the cell. Eukaryote  This have al lot of types and differences one each other  that at the most this in more for pluricelular organisms and they have a especific nucleus and more  organ...

This two are that you can find. Some plants and animals can use the two in different moments.  Sexual reproduction   This is make by meiosis. And need two haploid cells to have the reproduction. The cells that       we need are : Spermatozoid and ovulum. One part of the life cycle of the flower  they need         the pollem (male gametophyte) and the ovulum. Meiosis    The meiosis is the proces  of  division that make a cell to have the half of the genetic  information and only sexual cells. This are important in reproduction and is n or 1n. their phases are the same of mitosis but two times and in the second no are the interphase. Interphase  Prophase  Metaphase  Anaphase  Telophase Cytosinesis The  Interphase  are the when the Chromosomes duplicate in two. In the  Prophase  the nucleus dissapear. In the  Metaphase  the chromosomes are in the cente...

Asexual reproduction   In the asexual reproduction have that they don't need other that apport one gametophyte  to reproduce. The bacteria divide whit a axexual form.    Mitosis The  mitosis    are important to have our tissues well the mitosis are make in all our body and is the procces that the baby use to "grow". The mitosis make that at final are two cells that are identical to the mother. They are 2n. The procces have 6 phases that are  Interphase  Prophase  Metaphase  Anaphase  Telophase Cytosinesis The  Interphase  are the when the Chromosomes duplicate in two. In the  Prophase  the nucleus dissapear. In the  Metaphase  the chromosomes are in the center ready to move to the poles. In the  Anaphase  the chromosomes start to divide and the chromosomes move. In the   telophase  the Cromosomes are in the poles. In the  Citosinesis  is the moment that the cell i...