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What is the mode of reproduction of medusae Of polyps?
Medusae, the adult stage of jellyfish in the life cycle of cnidarians, primarily reproduce asexually through budding in polyps and sexually as free-swimming organisms. In their polyp stage, they can produce medusae by a process called strobilation, where the polyp develops and releases multiple juvenile medusae. In contrast, medusae reproduce sexually by producing eggs and sperm, leading to the formation of a fertilized egg that develops into a free-swimming larva known as a planula. This planula eventually settles and develops into a polyp, continuing the life cycle.
How do polyp and medusae in coelenterates alternate with each other?
Polyp is a asexual form which has a cylindrical body just like hydra whereas the medusa form is sexual form and has an umbrella shape. In case of Aurelia, the adult is sexual form. Males and females are separate and after copulation the female releases eggs which develop into a hydra like structure called ephyra larva which is called polyp form. This larva by budding produces umbrella shaped medusa forms. Thus the asexual polyp form alters with the sexual medusa form. This alternation of generations is called metagenesis.
Which phylum has both medusa and polyp stages in its life cycle?
Cnidaria is the phylum that exhibits both medusa and polyp stages in its life cycle. Medusae are the free-swimming form, while polyps are typically attached to a substrate.
What is a medusae?
Medusae are the adult, free-swimming stage of jellyfish, characterized by a bell-shaped body with tentacles hanging down. They are capable of movement and capturing prey using their stinging tentacles. Medusae are part of the life cycle of most jellyfish species.
What are the two body forms of cnidarians?
The two body forms of cnidarians are the polyp and the medusa. Polyps are typically sessile, tube-shaped organisms attached to a substrate, while medusae are free-swimming, umbrella-shaped organisms.
Can crystals reproduce?
No but crystal jellyfish do. Crystals reproduce by alternating between asexual benthic polyps and seasonal planktonic medusae.
What is the mode of reproduction of medusae Of polyps?
Medusae, the adult stage of jellyfish in the life cycle of cnidarians, primarily reproduce asexually through budding in polyps and sexually as free-swimming organisms. In their polyp stage, they can produce medusae by a process called strobilation, where the polyp develops and releases multiple juvenile medusae. In contrast, medusae reproduce sexually by producing eggs and sperm, leading to the formation of a fertilized egg that develops into a free-swimming larva known as a planula. This planula eventually settles and develops into a polyp, continuing the life cycle.
Why are medusae considered plankton?
The polyps may be found attached to docks or floats, while the medusae live in the plankton.
Compare the body forms of a polyp and medusa?
Polyps and medusae are two distinct body forms of cnidarians. Polyps are typically cylindrical and sessile, with a mouth and tentacles facing upward, anchored to a substrate. In contrast, medusae are free-swimming and have an umbrella-shaped, bell-like structure, with the mouth and tentacles hanging downward. This differences in morphology reflect their adaptations to different lifestyles within their life cycle, with polyps often engaging in asexual reproduction and medusae primarily involved in sexual reproduction.
Are cnidaria symmetrical?
Cnidaria have two basic body forms: swimming Medusae and sessile Polyps, and they are both radially symmetrical.
Reproduction of polyps?
Polyps reproduce asexually through a process called budding. This involves the formation of new polyps from the original polyp, which then detach and grow into independent individuals. Polyps can also reproduce sexually by releasing eggs and sperm into the water for fertilization.
How does polyp reproduce?
Polyps can reproduce either asexually through budding, where new polyps develop from the parent polyp, or sexually by releasing eggs and sperm into the water for fertilization. In sexual reproduction, polyps can produce larvae that will eventually settle and grow into new polyps.
How do polyp and medusae in coelenterates alternate with each other?
Polyp is a asexual form which has a cylindrical body just like hydra whereas the medusa form is sexual form and has an umbrella shape. In case of Aurelia, the adult is sexual form. Males and females are separate and after copulation the female releases eggs which develop into a hydra like structure called ephyra larva which is called polyp form. This larva by budding produces umbrella shaped medusa forms. Thus the asexual polyp form alters with the sexual medusa form. This alternation of generations is called metagenesis.
Did a coral spends their adult lives as Medusa?
Corals do not spend their adult lives as medusae. Instead, they primarily exist as polyps, which are sessile, cylindrical forms that attach to the substrate and form coral reefs. The medusa stage is typically associated with the life cycle of jellyfish, which are part of the same phylum, Cnidaria, but corals do not develop into medusae in their adult form. Some corals may have a medusa stage in their reproductive cycle, but they predominantly remain as polyps throughout their lives.
Is a Medusa nervous system more complex than a polyp?
Yes, a Medusa has a more complex nervous system than a polyp. Medusae, which are the free-swimming life stage of jellyfish, possess a nerve net that allows for more coordinated movement and responses to stimuli. In contrast, polyps, which are typically sessile, have a simpler nerve net that supports their stationary lifestyle. This complexity in Medusae enables better swimming and prey capture behaviors compared to polyps.
How did polymorphism in cnidarians influence adaptive radiation of the group?
Polymorphism in cnidarians, such as having different body forms like medusae and polyps, allowed for niche differentiation and exploitation. This increased the ecological diversity within the group, facilitating adaptive radiation into various habitats and lifestyles. These different forms allowed cnidarians to occupy different ecological niches, promoting speciation and diversification.
How does the macrodactyla doreensis reproduce?
Anemone are not very picky about how the reproduce. Like many Actiniidae family members, M. doreensis commonly divides as well as buds and releases polyps.
