Sexual and asexual reproduction
Sexual reproduction is a production that requires two parents that form off-spring that inherit genetic information from each parent .Sexual reproduction uses meiosis, which is a single cell that divides two times to produce four cells that include some genetic information. These cells tell us whether we are male or female, in male cells they produce sperm, Female cells produce eggs. Sexual reproduction is mitosis times two, meaning there are twice the amount of stages in PMAT. Some advantages in sexual reproduction is that the off-spring takes genetic information from both parents, which gives uniqueness to the off-spring. There are Higher chances of survival; in asexual reproduction, if one off-spring has an illness it can spread to all the others, in sexual reproduction it is not the case.Some disadvantages of Sexual reproduction are finding a mate to reproduce with, fewer off-spring are produced, and bad genes are passed down to off-spring.
Asexual reproduction is a production that requires one parent to form off-spring that are copies of the parent cell. Asexual reproduction uses mitosis, mitosis is a type of cell division that ends in two daughter cells, which both have the same kinds of chromosomes as the parent. Asexual reproduction requires only one parent, and the off-spring will be an exact division of its parent. Some advantages are that asexual reproduction doesn’t need any energy or time into finding a mate to reproduce, it does it by itself.In Asexual reproduction, there are a large number off-spring that are produced. Disadvantages include no diversity in the off-spring, there are easily prone to extinction because if one off-spring has a weakness they all have the same weakness, they also do not work well environment changes.
Mitosis, Meiosis and there differences
Mitosis is a very simple process of copying a cell. It copy’s the genes and the daughter cells, the duplicated cell is an exact copy of the parent cell with all its genetic information. Meiosis is a similar process to mitosis because mitosis uses PMAT (prophase, metaphase, anaphase, and telophase) and meiosis uses PMAT two times. The difference between them is that each one has a reproduction process, for example, asexual reproduction uses mitosis.A big difference of the both is that the criteria is different for both of them, meiosis does not produce copies of a cell, although the cell has similar genes, mitosis occurs in all organisms while meiosis only occurs in humans, animals, plants, and some fungi
How organisms grow
A cell grows by taking in nutrients and taking up surface area as they grow. An organism starts as one cell. There are different types of cell growth, like pollination where a yellow like substance discharges from a male plant to reproduce. Embryotic development is a quick stage that goes from one cell, to two, to four, to eight cells, and then the morula stage that finishes the cycle. Internal fertilization is when sperm cell is inside a female body where they meet an egg cell.There is mating and methods of fertilization where there are different times to mate, different kinds of mating, internal and external, and many condition that need to be met, like how there must be enough nutrients for the cell.
http://www.ducksters.com/science/biology/cell_division.php
http://www.biology4kids.com/files/cell2_mitosis.html