Question

What is digenetic life cycle?

Answer 1

In biology, life cycle means the series of changes which takes place in a species as they pass from the developmental stage, i.e. embryo to the inception of that stage in subsequent generations.

Complete answer:
- Having two or more hosts through the causes of the life cycle, as in some parasites, such as trematodes the combination of hosts to complete the life cycle is called digenetic and they perform their work together. For example: A life cycle in which alteration of sexual and asexual generations. Example: adult and larval stage in trematodes.
- Digenetic having two stages of multiplications one sexual in the mature forms, the other asexual in the larval stage. For example: Eggs become embryonated in freshwater over two weeks; embryonated eggs release misucidics. Which involves a suitable snail intermediate host in the snail, the parasites undergo sexual developmental stage (sporocysts, radius, and cercasias). The life cycle of plasmodium requires two hosts (Human and mosquitoes) for completion.
- Descriptive of organisms of the subclass. Diagenesis of the class trematode within the platform phylum Platyhelminthes. The term means ‘’two beginnings’’, referring to a life cycle with alternation of generations, one parasite and the other free living. Digenea in the largest group of trematodes and the most important medically and economically.
- All members are endoparasitic with two or more hosts in the life cycle, the first host usually being a mollusc. The digenetic flakes include blood pleura and schistosomes that are generally considered to be the most serious helminthic human parasites.

Note: Genetics is a branch of biology concerned with study of genes. Genetic variation, and heredity in organisms and the diagenesis is a subclass of trematodes worms in which sexual reproduction as an internal parasite. Sexual reproduction as an internal parasites of a vertebrate alternates with asexual reproduction in a mollusk.