0
What else can I help you with?
In what way is the annelid digestive tract different from the digestive systems of cnidarians and flatworms?
The annelid digestive tract is a complete system with a distinct mouth and anus, allowing for a one-way flow of food, which enhances digestion and nutrient absorption. In contrast, cnidarians, such as jellyfish and sea anemones, have a simple gastrovascular cavity that serves both digestive and circulatory functions, with only one opening. Flatworms also possess a gastrovascular cavity but lack specialized sections for digestion, making their system less efficient than that of annelids. This structural complexity in annelids allows for more advanced digestive processes.
What are 3 differences crayfish with annelids?
Crayfish, classified as crustaceans, have a hard exoskeleton, jointed appendages, and a segmented body divided into a cephalothorax and abdomen, while annelids, such as earthworms, possess a soft, segmented body without an exoskeleton. Crayfish primarily live in aquatic environments and have gills for respiration, whereas annelids usually inhabit terrestrial or freshwater environments and breathe through their skin. Additionally, crayfish exhibit a more complex nervous system and are more mobile compared to the simpler, less mobile structure of annelids.
If cnidarians lost their cyidocytes it would be?
it would make them less capable of capturing food
What would happen if a cnidarians lost their cnidocytes?
it would make them less capable of capturing food
Is a pacific octopus a vertebrate?
it is none it is aan animal that lives in the sea
What is a shell-less mollusk?
Shell-less mollusks include: Squids, cuttlefish, and octopuses (class Cephalopoda) Nudibranchs & slugs (class Gastropoda) A+=slug
How are cnidarians more advanced then jellyfish?
Sponges are less complex because they are just made of individual cells. There is no level of organization past cells in sponges. Cnidarians, on the other hand, have tissues, a higher level of organization. Tissues allow for some forms, like box jelly fish, to have eyes (this is just one of many advantages of tissues). Cnidarians' level of organization stops there though, they have no organs (heart, brain, etc.).
Building complex molecules from less complex ones?
synthesis/catabolism
What invertebrates has cerebral ganglia that are organized into a brain?
Cephalopods, such as octopuses and squids, are invertebrates that possess cerebral ganglia organized into a brain. This complex nervous system allows them to exhibit advanced behaviors, problem-solving skills, and learning abilities. Additionally, some species of annelids, like certain polychaetes, also show a degree of brain-like structures in their ganglia, though they are less complex than those found in cephalopods.
How is the nervous system of a flatworm more complex than the sensory cells and nerve net of a Cnidaria?
The nervous system of flatworms is more complex than the sensory cells and nerve net of Cnidaria due to the presence of a centralized structure, including a pair of cerebral ganglia and longitudinal nerve cords, which allow for more coordinated movement and processing of information. In contrast, Cnidarians possess a decentralized nerve net that lacks a central brain, resulting in less complex behavior and response to stimuli. Flatworms exhibit bilateral symmetry and more sophisticated behaviors, indicating a higher level of neural organization compared to the simpler radial symmetry of Cnidarians. This complexity enables flatworms to engage in more advanced functions such as learning and problem-solving.
Do mollusk cells have a nucleus?
No. There are different classes of mollusks. Gastropods (shell-less or single-shelled), Bivalves (2 shells held together by 1 of 2 powerful muscles), and Cephalopods (Small internal shells or no shells at all)
What has the author Jessie J Rankin written?
Jessie J. Rankin has written: 'A freshwater shell-less mollusc from the Caribbean' -- subject(s): Mollusks
