Importance of Reproduction
The biological method by which new organisms are produced from their parents is called reproduction. [1] Every kind of species, no matter their appearance or habitat must reproduce. The survival of the entire species depends on its reproductive success. All living things die, and to ensure that the species will continue in the future and onto the next generation, they must reproduce.
Asexual and sexual are the two different ways of reproduction. With asexual reproduction their is only one parent and the offspring is a clone. There is only one chromosome used and it is duplicated and divided. Asexual reproduction is primarily used for single-celled organisms. There are four different ways of asexual reproduction: binary fission which is cell division in prokaryotes, budding which is when the offspring branches and grows from the parent, fragmentation which is when only a piece of the organism forms a new organism, and vegetative propagation which is when plants grow from another plant. In sexual reproduction, there are two parents working together to create the offspring, meaning that there is a combination of chromosomes. Unlike in asexual reproduction, sexual reproduction requires fertilization for the genes to be passed on to the offspring. Fertilization can either occur externally when the eggs are fertilized outside the body, or internally when the eggs are fertilized inside the female body. The fusion of gametes (sex cells) is triggered during fertilization. [2]
Asexual and sexual are the two different ways of reproduction. With asexual reproduction their is only one parent and the offspring is a clone. There is only one chromosome used and it is duplicated and divided. Asexual reproduction is primarily used for single-celled organisms. There are four different ways of asexual reproduction: binary fission which is cell division in prokaryotes, budding which is when the offspring branches and grows from the parent, fragmentation which is when only a piece of the organism forms a new organism, and vegetative propagation which is when plants grow from another plant. In sexual reproduction, there are two parents working together to create the offspring, meaning that there is a combination of chromosomes. Unlike in asexual reproduction, sexual reproduction requires fertilization for the genes to be passed on to the offspring. Fertilization can either occur externally when the eggs are fertilized outside the body, or internally when the eggs are fertilized inside the female body. The fusion of gametes (sex cells) is triggered during fertilization. [2]
Mitosis and Meiosis
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Mitosis and Meiosis are the two ways cell division and reproduction can occur. Mitosis is used by single celled organisms and is how one cell gives rise to two daughter cells which are genetically identical. It is also responsible for the organic growth of tissues, fibers, and membranes. Meiosis on the other hand, is responsible for the sexual reproduction of organisms. It involves in two fissions of the nucleus and gives rise to four gametes which result in having half the number of chromosomes of the original cell.
How do Manta rays reproduce?
Manta Rays reproduce sexually, meaning they reproduce through internal fertilization. They are known to usually mate during October and November or March and April. Manta Rays have cleaning sites for themselves and around this time, the cleaning sites become the main area of the reproduction actions. It is possible that the females send the males a sexual pheromone, allowing them to know that they are ready to mate. The males line up and follow the male; there have been up to 20 males after one female. [4] From a thin membranous egg case, the baby manta rays hatch in the mother's oviduct. Just like human babies, they stay inside of their mother until they are fully developed.