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Some cnidarians have a life cyce wih an alternation of generations between asexual reproduction and sexual reproduction; while asexual reproduction provides a large increasing of (identical) individuals, sexual reproduction mantain a genetic pool variety.
The generation supposed to reproduce asexually is polypoid; the generation supposed to reproduce sexually is medusoid.
Tipically, medusae produce male and female gametes, which fuse together making zygotes; a zygote becames an egg from which hatches a free swimming larva called planula; the planula reaches the sea floor and developes into a polyp; the polyp then becames a strobila (segmented polyp), wich reproduces asexually by strobilation, segmenting itself and producing many ephyras, which can be released one at a time or all together at the same time; each ephyra maturates into an adult medusa, reaching the reproductive maturity.
What else can I help you with?
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.
What is the advantage of the medusa over the attached polyp in the Cnidarian?
The advantage of a medusa body form over the attached polyp form in Cnidarians is increased mobility. Medusas are free-swimming and can move through the water, allowing them to spread and find food more easily. This mobility also facilitates reproduction as medusas can disperse gametes over a wider area.
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.
Why a medusa needs a more complex nervous system than a polyp?
A medusa, being a free-swimming organism, requires a more complex nervous system than a polyp to coordinate its movement and respond to its environment effectively. The medusa's nervous system, often referred to as a "nerve net," allows for quicker reflexes and more sophisticated behaviors, such as swimming and hunting. In contrast, polyps are typically sessile and rely on simpler nerve networks for basic functions, making their nervous systems less complex. This adaptation reflects the differing lifestyles and ecological roles of the two forms in the life cycle of cnidarians.
What is the attached body form of cnidarions?
Cnidarians, which include jellyfish, corals, and sea anemones, exhibit two primary body forms: the polyp and the medusa. The polyp is a sessile, cylindrical form that attaches to a substrate, while the medusa is a free-swimming, bell-shaped form. Both forms have a gastrovascular cavity for digestion and specialized cells called cnidocytes that contain stinging structures. The life cycle of many cnidarians involves a transition between these two forms.
What is a bowl shaped cnidarian that is adapted for swimming?
A bell-shaped cnidarian adapted for swimming is known as a medusa. Medusae have a jelly-like, umbrella-shaped body with tentacles hanging down and are capable of free-swimming movements in the water. They are typically the adult form of cnidarians, with the polyp form being the stationary phase in the life cycle.
Does Medusa's have a relationship with another god est?
yes medusa had a good relationship with perseus.
What is the free-swimming adult form of a jellyfish called?
An adult swimming cnidarian is called a medusa.
What major difference distinguishes the life cycles of hydrozoans and anthozoans?
One major difference is that hydrozoans typically exhibit both medusa and polyp stages in their life cycle, while anthozoans only have a polyp form. Hydrozoans can undergo alternation of generations, switching between medusa and polyp forms, while anthozoans remain primarily as polyps throughout their life cycle.
How old was Medusa when Zeus wanted to marry her?
Zeus never wanted to marry Medusa; Medusa had a relationship with Poseidon in Athena's temple.
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.
What was the contest between Aphrodite and Medusa?
A WEAVING CONTEST was the contest between Aphrodite and Medusa.
Two main forms of life for the cnidarians?
Polyps, which are Sessile or stationary, and Medusa which move.
What was Medusa's Relationship?
Wasn't it with like snakes or something of the sort??
What are two body forms in the phylum cnidarian?
The two body forms in the phylum Cnidarian are the polyp and medusa. Polyps are usually stationary, with a cylindrical body and tentacles surrounding a central mouth. Medusas are free-swimming and have a bell-shaped body with tentacles hanging down.
Explain the difference between a polyp and a Medusa?
A polyp is anchored to substrate, like a rock or piece of coral. Anemones are polyps. They catch food with their tentacles and have the mouth on the upside. A medusa is swimming freely. Jellyfish are medusa stages. They catch food with their trailing tentacles and have the mouth on the downside. You can view polyps as the settled ´plant´ and medusa as the free-floating ´seed´, like in a dandelion. Though they aren´t plants at all, of course.
Do cnidarians the polyp body type is usually sessile the Medusa body type is free-swimming?
are you stupid
