Which of the following animals have both a polyp and a medusa body plan during their life cycle?
Cnidarians have two distinct body plans, the medusa (a) and the polyp (b). All cnidarians have two membrane layers, with a jelly-like mesoglea between them. Some cnidarians are dimorphic, that is, they exhibit both body plans during their life cycle.
What is the difference in medusa and polyp shape body plans?
Polyp have a tubular shape and are fixed at their base, with the mouth present at the other end of the tube facing the water. Medusa have a bell shape, with tentacles hanging down.
Which body plan do corals have polyp or medusa?
The cnidarians have two basic body forms: Polyp: The polyp is a cup-shaped body with the mouth facing upward, such as a sea anemone and coral. Medusa: The medusa is a bell-shaped body with the mouth and tentacles facing downward, such as a jellyfish.
What type of animals have a polyp shape?
polyp, in zoology, one of two principal body forms occurring in members of the animal phylum Cnidaria. The polyp may be solitary, as in the sea anemone, or colonial, as in coral, and is sessile (attached to a surface).
What are polyps and medusa in cnidaria?
There are two basic cnidarian body shapes: a polyp form, which is attached to a surface; and an upside-down free-floating form called a medusa. Some cnidarians change form at different phases of their life cycle, while others remain in one form for their entire life.
What differences do you see in the polyp and medusa stages of obelia to that of Aurelia?
- It has a small size, often called swimming bell and the medusa is produced by budding from blastostyles of polypoid obelia colony.
- Medusa phase is reduced.
- The bell margin is entire and is provided with few long, solid tentacles.
- The velum contains an endodermal ring canal.
What are polyps in animals?
How does the medusa stage of an animal differ from the polyp stage?
Most of the Cnidarian classes utilise polyp and medusa as two stages of their life cycle. Polyps are sessile and asexually reproduce by budding. But, medusa reproduces sexually by producing sperms and eggs. The key difference between polyp and medusa is that polyp is sessile whereas medusa is free-swimming.
What is difference between polyp and medusa shown by cnidarians?
While in other cnidarian classes such as cubozoa or rhizostomeae medusa are produced by the metamorphosis of the polyp. Difference Between Polyp and Medusa: Polyp is a sessile life stage of the cnidaria phylum whereas medusa is totally opposite i.e they have a mobile life cycle stage of the cnidaria phylum.