Question

What is the difference between Urochordata and Cephalochordata?

Answer 1

Urochordata:

1. Urochordata is a varied genus of marine invertebrates that filter feed.
2. They filter seawater via their bodies to catch planktonic particles.

Cephalochordata:

1. Cephalochordates are creatures distinguished by the existence of a notochord.
2. They are ciliary feeders, meaning that they employ cilia to create a stream of water and phytoplankton particles in their mouths.

Difference between Urochordata and Cephalochordata:

Urochordata	Cephalochordata
1. Urochordata is a chordate group that includes tunicates.	1. Cephalochordate is a chordate group that includes lancelets.
2. They are closer to vertebrates.	2. They are closer to echinoderms.
3. The notochord can only be found in the back of the body.	3. The notochord extends to the head region.
4. Only in the larval stage, they have a notochord and a post-anal tail.	4. Throughout their lives, they have a notochord and a post-anal tail.
5. They are devoid of a coelom.	5. They've got a coelom.
6. They have a heart and an open circulatory system.	6. Their circulatory system is closed.
7. Nephrocytes are responsible for excretion.	7. Protonephridia and solenocytes excrete waste.
8. During the larval stage, they swim freely; adults are sessile.	8. They are free-swimming fish-like creatures.
9. They are only found in the sea.	9. They are found in the region buried beneath the sand of the coast's intertidal zone.
10. They reproduce asexually through budding.	10. They are not capable of asexual reproduction.
11. They are hermaphrodites or bisexuals.	11. They are unisexual creatures.
12. Herdmania, Doliolum, Oikopleura, and other examples	12. Branchiostoma and Amphioxus are two examples.