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How can a life cycle that involves two forms, called polymorphism, be of benefit to an animal, especially if one stage is sessile (stationary)? Medusi disperses species, is adapted to multiple habitats. How can radial symmetry benefit an animal? How to hydras TYPICALLY reproduce?
- Why is it an advantage to have two body plans at different times in the life for cnidarians?
- How does radial symmetry benefit animals quizlet?
- What are some adaptations that allow for the medusa form to be free swimming?
- Who was the first to solve the mystery of whether cnidarians were animals or plants?
- What main differences are there between the 2 body plans types of cnidarians?
- What is it called when cnidarians exhibit two different body forms?
- How can a life cycle that involved two forms polymorphism be of benefit to an animal especially if one is sessile?
- What 2 benefits do animals with bilateral symmetry enjoy?
- How does radial symmetry benefit animals?
- Why do they call jellyfish medusa?
- Which organism possesses both a polyp and medusa phase of life?
- What is the function of medusa?
- What important roles do cnidarians play in coral reefs?
- Is Jelly a medusa or polyp?
- What allows cnidarians to be able to bend in different directions two answers?
Why is it an advantage to have two body plans at different times in the life for cnidarians?
There are many advantages for the Cnidarians having two stages in their life cycle. One is in their Polyp Form, one of the stages; they can grow from their juvenile stage easily like the Porifera's do. Another advantage comes from their second stage called the Medusas Stage.
How does radial symmetry benefit animals quizlet?
How can radial symmetry be a benefit to an animal? An animal can reach out in all directions for food.
What are some adaptations that allow for the medusa form to be free swimming?
The mouth opens into the main body cavity, or enteron, which connects with radial canals extending to the outer rim of the bell. The medusa is a free-swimming form; it moves by rhythmic muscular contractions of the bell, providing a slow propulsive action against the water.
Who was the first to solve the mystery of whether cnidarians were animals or plants?
Trembley was a scientist, and like the modern members of this tribe of discoverers, he then made systematic observations to support his hypothesis that these freshwater polyps from his pond — now called hydra — were animals instead of plants because they moved and caught and ate prey.
What main differences are there between the 2 body plans types of cnidarians?
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. In these species, the polyp serves as the asexual phase, while the medusa serves as the sexual stage and produces gametes.
What is it called when cnidarians exhibit two different body forms?
Cnidarians have two distinct morphological body plans known as polyp, which are sessile as adults, and medusa, which are mobile; some species exhibit both body plans in their lifecycle.
How can a life cycle that involved two forms polymorphism be of benefit to an animal especially if one is sessile?
How can a life cycle that involves two forms, called polymorphism, be of benefit to an animal, especially if one stage is sessile (stationary)? Medusi disperses species, is adapted to multiple habitats. How can radial symmetry benefit an animal? How to hydras TYPICALLY reproduce?
What 2 benefits do animals with bilateral symmetry enjoy?
Swift movement and good sense organs (nose, eyes, mouth, and ears) help animals with bilateral symmetry obtain food and avoid enemies; characteristics that have helped this type of animal become more advanced and survive other animals.
How does radial symmetry benefit animals?
Radial symmetry is advantageous to sedentary organisms because sensory receptors are evenly distributed around the body. ... For sessile (sedentary) organisms, radial symmetry is useful because the animal can just "sit down" and grab food or detect threats from all directions.
Why do they call jellyfish medusa?
3. A jellyfish is called a Medusa. ... The shape of this bell is called a medusa because it looks like the evil Medusa in Greek mythology - a woman who had offended the goddess Athena who then changed her hair into snakes and made her face so hideous it turned people into stone.
Which organism possesses both a polyp and medusa phase of life?
They are the most primitive of animals whose cells are organized into distinct tissues, but they lack organs. Cnidarians have two body forms—polyp and medusa—which often occur within the life cycle of a single cnidarian. Sea nettle (Chrysaora fuscescens).
What is the function of medusa?
The medusa form is generally small and short-lived. Its primary function is to carry out sexual reproduction and to allow the species to disperse to different locations. Hydrozoa are classified based on the presence of a membrane called the velum that lines the inside edge of the bell in the medusa forms.
What important roles do cnidarians play in coral reefs?
They are major constituents of coral reefs. Cnidarians are integral parts of the marine ecosystem where they may engage in symbiotic relationships with other organisms and where their predatory activities contribute to the delicate balance of the oceanic food chain.
Is Jelly a medusa or polyp?
Jellyfish have a stalked (polyp) phase, when they are attached to coastal reefs, and a jellyfish (medusa) phase, when they float among the plankton. The medusa is the reproductive stage; their eggs are fertilised internally and develop into free-swimming planula larvae.
What allows cnidarians to be able to bend in different directions two answers?
What allows cnidarians to be able to bend in different directions? Two different sets of muscles. How do nerve cells work with muscle cells to give the cnidarian movement? Electrical impulses trigger the each set of muscles for raising and bending.
