Question

Как образуются поколения у сцифоидных медуз?

Answer 1

В жизненном цикле медуз закономерно чередуются половое и бесполое поколения.При половом размножении из зиготы развивается личинка-планула.Планула весной превращается в маленького полипа.А из полипов образуются медузы,которые в свою очередь выбрасывают половые продукты в воду и они сливаются,образуя опять зиготу

Answer 2

Formation of Generations in Scyphozoan Jellyfish

Scyphozoan jellyfish, also known as true jellyfish, have a complex life cycle involving different stages of development. The formation of generations in scyphoid medusae involves several key processes.

Life Cycle: The life cycle of scyphozoan jellyfish typically includes both sexual and asexual reproduction. The stages of the life cycle include the polyp stage, the ephyra stage, and the medusa stage.

Polyp Stage: - The life cycle begins with the polyp stage, where a larva settles on a substrate and transforms into a polyp. - The polyp reproduces asexually by budding, forming new polyps that are genetically identical to the parent polyp.

Ephyra Stage: - From the polyp, ephyrae are formed through a process of strobilation, where the polyp undergoes a process of asexual reproduction to produce ephyrae, which are small, free-swimming organisms.

Medusa Stage: - The ephyrae develop into medusae, the characteristic jellyfish form, through a process of metamorphosis. - The medusae are the sexually reproductive stage of the scyphozoan jellyfish, and they release gametes into the water for sexual reproduction.

Reproductive Process: - The medusae release eggs and sperm into the water, where fertilization occurs, leading to the formation of planula larvae. - The planula larvae settle on a substrate and develop into polyps, thus completing the life cycle.

In summary, the formation of generations in scyphozoan jellyfish involves a complex life cycle that includes both sexual and asexual reproduction, with distinct stages such as the polyp, ephyra, and medusa stages. This intricate process allows for the continuation of the jellyfish population.

If you have further questions or need more details about any specific stage of the life cycle, feel free to ask!