Flatworms are considered more complex than hydra due to their advanced body organization and internal systems. They possess a bilateral symmetry, which allows for a more defined head and tail region, and exhibit a more developed nervous system with a centralized brain. Additionally, flatworms have a three-layered body structure (triploblastic) and specialized organs for digestion and excretion, whereas hydra are simpler, radially symmetrical organisms with a two-layered body structure (diploblastic) and a less complex nervous system. This increased complexity in flatworms reflects their evolutionary advancement over hydra.
No a hydra is not a fish. A fish is a vertebrate. A hydra is much more primitive.
No a hydra is not a fish. A fish is a vertebrate. A hydra is much more primitive.
No, flatworms are multicellular organisms with a simple body plan, but they do not have many cells compared to more complex organisms. They typically have around a few thousand to a few million cells.
Flatworms exhibit bilateral symmetry, which means that their body can be divided into two symmetrical halves along a single plane. This type of symmetry allows for the development of more complex body structures and directional movement.
Unsegameted worms offen are larger and their shape makes them more popular since flat worms aren't noticed so the more popular the more advance.
Flatworms have one opening that serves both as a mouth and an anus, which is part of their gastrovascular cavity. This single opening allows for the ingestion of food and the expulsion of waste. Unlike more complex organisms, flatworms have a relatively simple digestive system.
Nematodes, or roundworms, are considered more advanced than flatworms due to their more complex body structure and physiological features. They possess a complete digestive system with a distinct mouth and anus, allowing for more efficient nutrient processing. Additionally, nematodes have a more developed muscular system and a pseudocoelom, which provides better organ organization and function. Furthermore, their cuticle allows for greater adaptability to diverse environments compared to the simpler body plan of flatworms.
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.
The main difference between Hydra 10 and Hydra 20 is their capacity. Hydra 10 has a capacity for 10 gallons, while Hydra 20 has a capacity for 20 gallons. This means Hydra 20 can filter a larger volume of water compared to Hydra 10.
A hydra's diet does not change while budding, but it does eat more often.
Ganglia are nerve clusters. I don't know if flatworms have them or not; if they do, they probably function more or less like a rudimentary brain.
they are more related to roundworms