Animalscaretips
- Where do cnidarians only live in?
- Where does the name Cnidaria come from?
- Where are most cnidarians found?
- How do cnidarians move?
- What do all cnidarians have in common?
- Are cnidarians capitalized?
- Are cnidarians carnivores?
- Are octopus cnidarians?
- Do cnidarians occur everywhere in the world?
- What is the common adaptation of cnidarians?
- When did cnidarians first appear?
- Which of the following are cnidarians?
- Which group consists exclusively of cnidarians?
- What is the most abundant of the freshwater cnidarians?
Where do cnidarians only live in?
Cnidaria is a phylum containing over 9,000 species found only in aquatic and mostly marine environments.
Where does the name Cnidaria come from?
Cnidarians get their name from cnidocytes, which are specialized cells that carry stinging organelles called cnidocysts. As for the etymology, the word Cnidaria comes from the Greek word "cnidos", which means "stinging needle".
Where are most cnidarians found?
Cnidarians can be found in almost all ocean habitats. They may live in water that is shallow or deep, warm or cold. A few species live in freshwater. Some cnidarians live alone, while others live in colonies.
How do cnidarians move?
They contract their hollow, saucer-shaped bodies (called bells) to force water out, which propels them forward. Their long. tentacle-like arms, which trail out behind them, are used to sting and capture prey.
What do all cnidarians have in common?
Cnidarians share several basic characteristics. All Cnidaria are aquatic, mostly marine, organisms. They all have tentacles with stinging cells called nematocysts that they use to capture food. Cnidarians only have two body layers, the ectoderm and endoderm, separated by a jelly-like layer called the mesoglea.
Are cnidarians capitalized?
Phylums end in -a such as Porifera (sponges), Mollusca (sea shells) or Cnidaria (coral, anemones, jellies). Classes end in -da, -iae, -ta, -ea, or -oa. When writing the genus and species of an animal, you capitalize the genus, but not the species name, and italicize both.
Are cnidarians carnivores?
All cnidarians are carnivores. Most use their cnidae and associated toxin to capture food, although none is known actually to pursue prey. Sessile polyps depend for food on organisms that come into contact with their tentacles.
Are octopus cnidarians?
They are stinging creatures that's why they are called Cnidarians. From the above information we know that octopus belongs to phylum Mollusca.
Do cnidarians occur everywhere in the world?
Cnidarians inhabit all regions of the world's oceans and some freshwater environments. They are major constituents of coral reefs.
What is the common adaptation of cnidarians?
What is the common adaptation , which unites them into the common group of Cnidaria? Their ability to sting their prey. What language was the word Cnidaria derived from and what does the word mean? The language the word Cnidaria derived from is Greek and it means stinging nettle.
When did cnidarians first appear?
Fossil cnidarians have been found in rocks formed about 580 million years ago, and other fossils show that corals may have been present shortly before 490 million years ago and diversified a few million years later.
Which of the following are cnidarians?
Mostly marine animals, the cnidarians include the corals, hydras, jellyfish, Portuguese men-of-war, sea anemones, sea pens, sea whips, and sea fans.
Which group consists exclusively of cnidarians?
Among the following given options only Hydra, Obelia, Adamsia, Physalia consists exclusively of Cnidarians as these organisms can be characterized by the presence of tentacles on their bodies.
What is the most abundant of the freshwater cnidarians?
9.2A) may be the most commonly observed freshwater cnidarian occurring in streams, wetlands, and lakes. These small polyps are 1–20 mm long with 10–12 tentacles crowning a tubular body. Hydra species can float in the plankton but are commonly observed attached to hard substrata or macrophytes in benthic habitats.
