Why is Reproduction important?
Reproduction is a biological method by which new offspring or organisms are produced from their parents. Reproduction is necessary for living things for survival purpose and continuation of generation so that they do not become extinct. Without reproduction, a species would not be able to thrive or survive over time. Individuals must reproduce to ensure that they will continue on over generations of time. Without the means of making more individuals, a species wouldn't be able to thrive or survive from generation to generation. Many say it is the purpose of existence. Future generations of organisms would not be able to exist without reproduction.
This is called Reproductive success. Reproductive success is defined as the passing of genes onto the next generation in a way that they too can pass those genes on (incorporates inclusive fitness). It is the relative production of fertile offspring by a genotype. For example, the offspring produced as a result of normal mating are an example of reproductive success, because they too can pass their genetic material on to the next generation. Alternatively, the birth of a mule as a result of the mating of a horse and a donkey is not an example of reproductive success because the mule is sterile and thus not able to continue the germ line. Reproductive success is part of the calculation for fitness and a key element in the theories of natural selection and evolution.
Reproduction is a marvelous culmination of individual transcendence. Individual organisms come and go, but, to a certain extent, organisms "transcend" time by reproducing offspring. In a nutshell, reproduction is the creation of a new individual or individuals from previously existing individuals. In animals, this can occur in two primary ways: through asexual reproduction and through sexual reproduction.
This is called Reproductive success. Reproductive success is defined as the passing of genes onto the next generation in a way that they too can pass those genes on (incorporates inclusive fitness). It is the relative production of fertile offspring by a genotype. For example, the offspring produced as a result of normal mating are an example of reproductive success, because they too can pass their genetic material on to the next generation. Alternatively, the birth of a mule as a result of the mating of a horse and a donkey is not an example of reproductive success because the mule is sterile and thus not able to continue the germ line. Reproductive success is part of the calculation for fitness and a key element in the theories of natural selection and evolution.
Reproduction is a marvelous culmination of individual transcendence. Individual organisms come and go, but, to a certain extent, organisms "transcend" time by reproducing offspring. In a nutshell, reproduction is the creation of a new individual or individuals from previously existing individuals. In animals, this can occur in two primary ways: through asexual reproduction and through sexual reproduction.
Asexual vs. Sexual
Because of the lack of new genetic material, an organism clones itself through this process called asexual reproduction and makes genetically identical organisms. This can be advantageous in some circumstances, but also harmful in others, depending on how the makeup of the plant suits its ecosystem. Asexual reproduction can be very advantageous to certain animals. Animals that remain in one particular place and are unable to look for mates would need to reproduce asexually. Environments that are stable and experience very little change are the best places for organisms that reproduce asexually. Another advantage of asexual reproduction is that numerous offspring can be produced without "costing" the parent a great amount of energy or time. A disadvantage of this type of reproduction is the lack of genetic variation. All of the organisms are genetically identical and therefore share the same weaknesses. If the stable environment changes, the consequences could be deadly to all of the individuals. There are a few major ways in which plants asexually reproduce in their life cycles to secure future generations. Common forms of asexual reproduction include:
Mitosis and Meiosis
Mitosis is the process where a single cell divides resulting in generally two identical cells, each containing the same number of chromosomes and genetic content as that of the original cell. Before a dividing cell enters the mitosis phase of the cell cycle, it undergoes a period of growth called interphase. Interphase is the non-dividing stage where chromosomes spend 90% of there time here. In this stage, the cell replicates its genetic material and organelles in preparation for division. Mitosis is composed of several stages:
•Prophase
•Metaphase- Middle
•Anaphase- Apart Away JUST THINK OF PMAT!!!!
•Telophase-Two
•Prophase
•Metaphase- Middle
•Anaphase- Apart Away JUST THINK OF PMAT!!!!
•Telophase-Two
Meiosis is the process of cell division that makes gametes and results in 4 haploid cells.. Gametes are sex cells like sperm and egg. Haploid cells re cells with half the number of chromosomes from each parent in an offspring. In humans, the gametes have 23 chromosome. There are two stages of Meiosis: Meiosis I and Meiosis II. Meiosis II is the same as the process of Mitosis.
HOW IS IT DONE IN THE GUITARFISH?
How is it done in the Atlantic Guitarfish you may ask? Well, the Atlantic Guitarfish reproduce via internal fertilization also known as Aplacental viviparity or ovoviviparous and give birth to live young. The female's uterus is lined with tiny club shaped villi that provide nutrients for the young as they develop. The young are born fully developed and measure approximately 8 inches (20 cm) total length. There can be as many as 6 pups in each litter. Males are believed to be mature at 19-20 inches (48-51 cm) total length as indicated by well developed clappers at these sizes.