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What type of symmetry do cnidarians possess?
radial symmetry
Why do mitochondria possess two membranes?
Mitochondria possess two membranes because they are believed to have evolved from a symbiotic relationship between a primitive eukaryotic cell and a prokaryotic cell. The outer membrane helps protect the organelle, while the inner membrane is where important processes like cellular respiration occur.
Do hornets possess a photographic memory?
No, hornets do not possess a photographic memory.
Do hornets possess photographic memory?
No, hornets do not possess photographic memory.
Do prokaryotes possess an endoplasmic reticulum?
No, prokaryotes do not possess an endoplasmic reticulum.
All cnidarians possess long extensions of the body called tentacles?
True, tentacles are a common feature among cnidarians like jellyfish and sea anemones. These structures are typically armed with stinging cells called cnidocytes, which help cnidarians capture prey and defend against predators. Tentacles are used for a variety of functions including feeding, sensing the environment, and locomotion.
How do ctenophores differ from cnidarians?
Ctenophores are gelatinous creatures with rows of cilia for movement and lack stinging cells, while cnidarians have stinging cells called cnidocytes. Ctenophores also have a simpler body structure compared to the more complex body plans of cnidarians, which include jellyfish, corals, and sea anemones.
What are the few organs that Cnidarians have?
Cnidarians have a simple body plan with a sac-like structure composed of three layers of cells: the epidermis, the gastrodermis, and the mesoglea. They possess specialized cells called cnidocytes that contain stinging structures called nematocysts, used for defense and capturing prey. Cnidarians also have a simple nerve net for coordinating movements and responses.
Do cnidarians have sight?
Cnidarians do no possess eyes for sight, though many of them are able to sense light vs dark.
What anamiles haves pecialized stinging cells called nematocysts?
Nematocysts are specific to the phylum Cnidaria, which contains sea anemones, corals, and jellyfish, along with some less well-known animals. Nematocysts are the most common form of cnidocytes, the general term for the stinging cells all cnidarians possess.
What do all jellyfish possess to be classified as jellyfish?
Two things- stingers and a bell shape. Cnidarians belong to an invertebrate phylum that includes jellyfish, as well as hydras, sea anemones, and corals. The one common trait of all cnidarians is having stinging cells (cnidocytes) that can either protect them, aid in predation, or both. To specifically be a jellyfish, though, they must also have an adult medusa stage where they are free-swimming and have an umbrella shape.
What evolutionary advancements do the cnidarians have that are not present in poriferans?
Cnidarians exhibit several evolutionary advancements over poriferans, including the development of true tissues and a simple body plan with distinct cell layers (ectoderm and endoderm). They possess specialized cells called cnidocytes, which contain stinging organelles (nematocysts) used for capturing prey and defense. Additionally, cnidarians have a nerve net that allows for more coordinated movement and responsiveness to environmental stimuli, unlike the more rudimentary cellular organization found in poriferans. These features enable cnidarians to be more active and complex organisms in their ecological roles.
What structure allows a jellyfish and other cnidarians to respond to their environment?
Jellyfish and other cnidarians possess a simple nerve net structure that allows them to respond to their environment. This decentralized network of interconnected nerve cells enables them to detect stimuli such as light, touch, and chemicals. Additionally, specialized cells called cnidocytes contain stinging organelles that help with defense and capturing prey. Together, these structures facilitate basic movement and reaction to environmental changes.
Cnidarians are also called Coelenterates because they have?
Cnidarians are also called Coelenterates because they possess a central cavity or coelenteron that serves various functions, including digestion and waste removal. This cavity is a defining feature of this group of animals and gives them their alternate name.
How is this body design of flatworm different from the Cnidarian bauplan?
Flatworms exhibit a bilateral symmetry and aacoelomate body plan, meaning they lack a body cavity and have a simplified organization with three tissue layers. In contrast, cnidarians have a radial symmetry and a body plan characterized by a gelatinous mesoglea layer, with two main tissue layers: the ectoderm and endoderm, and a central gastrovascular cavity. Additionally, cnidarians possess specialized cells called cnidocytes for capturing prey, which flatworms lack. Overall, these fundamental differences in symmetry, body organization, and tissue structure distinguish flatworms from cnidarians.
True or false All cnidarians possess long extensions of the body called tentacles?
A:True
Why are cnidarians invertebrates?
these animals lack a column of bones, or spine, that the vertebrates possess. b for plato
