Question
Write down four general characters of cnidarians (coelenterates). Give two examples.
✓
Answer
- Cnidarians or coelenterates are multicellular, diploblastic animals with tissue grade of organisation. A gelatinous layer called mesoglea persists between the ectoderm and endoderm.
- Body shows radial symmetry.
- Respiratory, circulatory and excretory organs are absent.
- Nervous system is primitive, has only network of nerve cells.
Example: Hydra and Aurelia (jelly-fish).
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
What are the possible dangers of global warming?
What do you mean by passive and active transport? Write a note on diffusion.
What is the difference between parenchyma and collenchyma?
- Label W, X, Y, and Z.
- Which is the covering membrane of X known as?
- Which of them contain hydrolytic enzymes?
- Which one of them takes part in storage modification and packaging of various chemicals?
What would happen when eukaryotic cells are placed in hypotonic, hypertonic and isotonic solutions?
What is human immune system? What is a vaccine? How immunisation can be achieved?
Write any two differences between prokaryotic and eukaryotic cells.
How many centres have been established in India for artificial insemination of cows and buffaloes?
“Prevention of disease is more desirable than its treatment”. Justify the statement by discussing three major strategies to be adopted for the prevention of infectious diseases.
Why are plants and animals so different?