Question

In: Biology

Tunicates has bilateral symmetry but is not cephalized. What features of this organism' life history do...

Tunicates has bilateral symmetry but is not cephalized. What features of this organism' life history do you think contribute to it not sharing the association of cephalization and bilateral symmetry?

Solutions

Expert Solution

Ans: Mostly organisms who are cephalized are also bilateral symmetrical. But this is not the case with Tunicates.

This is because of the retrogressive metamorphosis observed in them.

Tunicate larva has a nerve cord in its tail which is similar to the nerve cord found in vertebrates. But when this larva develops in to an adult it settles at the bottom of the sea or a stone and the tail ( along with nerve cord) is reabsorbed to provide nutrition to the developing adult.

As nerve cord is present in larvae but absent in adult this metamorphosis is called retrogressive metamorphosis.

Because of the absence of nerve cord in adult Tunicates have bilateral  symmetry but don't have cephalization.


Related Solutions

Tunicates is non cephalized but has a bilateral body symmetry. What features of tunicates life history...
Tunicates is non cephalized but has a bilateral body symmetry. What features of tunicates life history do you think contributed to it not sharing the association of cephalization.
Are most animals vertebrates or invertebrates? How does bilateral symmetry differ from radial symmetry? What is...
Are most animals vertebrates or invertebrates? How does bilateral symmetry differ from radial symmetry? What is cephalization?
life history decisions have no impact on the fitness of an organism
life history decisions have no impact on the fitness of an organism
In studying the life history of an organism, we often discuss the concept of trade-offs because...
In studying the life history of an organism, we often discuss the concept of trade-offs because organisms are limited in the energy they can allocate to different functions. We covered trade-offs in both plants and animals. Give two examples of trade-offs (one in plants and one in animals). Describe the tradeoff you name and include a line-graph to show (graphically) what this trade-off would looks like.
what structures common to all chordates do all adult tunicates possess
what structures common to all chordates do all adult tunicates possess
What life history factors influence lambda?
What life history factors influence lambda?
What features do reptiles possess that make them better adapted than amphibians to terrestrial life?
What features do reptiles possess that make them better adapted than amphibians to terrestrial life?
Phylum Porifera -what kind of body symmetry do they have - what are the unique structures...
Phylum Porifera -what kind of body symmetry do they have - what are the unique structures (why are they in this phylum not another) -how do they get their food -where are they found -common examples
According to Taylor, every "organism, species, population, and community of life has a good of its...
According to Taylor, every "organism, species, population, and community of life has a good of its own." What does he mean by that claim? What relevance does it have for environmental ethics,,,, in seven sentence.
Section 28.3 What germ layers are present in lophotrochozoans? What type of symmetry do they have?...
Section 28.3 What germ layers are present in lophotrochozoans? What type of symmetry do they have? What two ciliated structures are found in lophotrochozoans? What is the purpose of each? Describe flatworms in terms of their germ layer, symmetry, feeding habit, and coelom. Flatworms lack a circulatory and respiratory system. How then do their cells exchange gases and obtain nutrients? What are the four major classes of flatworms? How do they differ in terms of their lifestyle? Give an example...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT