Which of the following characteristics do arthropods share with members of the phylum Annelida note there may be multiple correct answers?
A distinguishing characteristic shared by annelids and arthropods is their body segmentation. At some point in development, segmented animals possess a body plan with repeating segments of identical or similar structures. Later in development, some segments may form more specialized structures.
What do segmented worms annelida and arthropods have in common that would make is think they are similar?
Both arthropods and annelids are segmented, and members of the annelid class Polychaeta have a pair of appendages on each segment. The plan of the nervous system in arthropods is very similar to that of annelids, and the basic plan in both groups shows a tubular, dorsal heart, which is then lost or modified in some.
What are the similarities between oligochaetes and Hirudinea?
Similarities Between Polychaetes and Oligochaetes Polychaetes and oligochaetes are two subclasses of the phylum Annelida. Both can be free-living. Also, both have a true coelom derived from the mesoderm. Further, they both have a segmented body with bilateral symmetry.
What are some unique features of annelids?
Characteristics of Phylum Annelida
- They have a long and segmented body.
- Annelids are bilaterally symmetrical.
- They are triploblastic.
- Also, they exhibit organ system grade of organisation, showing organ differentiation.
- The body is covered with a thin cuticle.
- They are coelomate.
What is the difference between Polychaetes and oligochaetes?
Polychaetes refer to the marine annelids, with unsegmented swimming appendages with many chaetes. Meanwhile, oligochaetes refer to the hermaphroditic terrestrial or aquatic annelids that lack a specialized head.
What is the classification of nereis?
Polychaete
Nereis/Class
What are 5 characteristics shared by all worms?
They have five paired organs that act like hearts to pump their blood through large blood vessels. They have a brain and nerve cord. They have reproductive organs and waste-removal organs. Well-developed muscles let the worms crawl through the soil or on top of the ground.
What four ways do polychaetes differ from oligochaetes?
Polychaete: mostly marine segmented worms. well developed head, each segment usually has parapapodia with chaetae, tube-dawelling and free moving. Oligochaeta: freshwater, marine, and terrestrial segmented worms such as earthworms, reduced head, no parapodia, chaetae present.
What are the similarities between polychaetes and oligochaetes?
What are the physical characteristics of an annelid?
The common characteristics of annelids are as follows: Annelids have a long cylindrical body The body is segmented internally as well as externally Bilaterally symmetrical Vermiform They are cephalopods They have a true body cavity Annelids have a gut with mouth and anus The body is divided into three sections.
What are the physical characteristics of a crayfish?
Physical Characteristics. Cephalothorax: One of two main body parts of the crayfish; holds support for the head and the crayfish’s walking legs–it acts the same way as the human torso and neck do! Antennule: These are like small antennae. Like the antennae, they are sensory organs that function to help the crayfish hear, smell, and taste.
How are crayfish different from other arthropods?
Other arthropods include insects, spiders, and centipedes. Crayfish continually shed their exoskeleton and regrow a new one. During this transition is when they are most vulnerable to predators because they aren’t protected by their outer shell.
What kind of food does a crayfish have?
But in the South, ‘crawfish’ boils are a delicious and fun summer staple. What and Where are Crayfish? Crayfish are invertebrates which means they don’t have a backbone. They are also arthropods, which means that they have a protective exoskeleton on the outside of their body. Other arthropods include insects, spiders, and centipedes.
How are annelids and mollusks alike and different?
Like mollusks, annelids exhibit protostomic development. Annelids are bilaterally symmetrical and have a worm-like appearance. Their particular segmented body plan results in repetition of internal and external features in each body segment. This type of body plan is called metamerism.
What kind of body plan does an annelid have?
The phylum includes earthworms, polychaete worms, and leeches. Like mollusks, annelids exhibit protostomic development. Annelids are bilaterally symmetrical and have a worm-like appearance. Their particular segmented body plan results in repetition of internal and external features in each body segment. This type of body plan is called metamerism.
What kind of fertilization does a crayfish use?
Crayfish´s Reproductive Method Crabs have different ways to attract their couples, as it can be by employing pheromones, acoustic or vibratory media, and even visual means, such as the fiddler crab, which is one of the most boastful crabs in terms of courtship. They carry out internal fertilization, and the copulation is performed belly to belly.
What kind of worms are in the annelid family?
The annelids traditionally include the oligochaetes, which include the earthworms and leeches, the polychaetes, which are a marine group, and two other smaller classes. The phyla Mollusca and Annelida belong to a clade called the Lophotrochozoa, which also includes the phylum Nemertea, or ribbon worms ( [link]).
