Advertisements
Advertisements
प्रश्न
Write down four characteristics of Ctenophora and give two examples.
Advertisements
उत्तर
Characteristics of Ctenophora:
(i) They have a transparent body with biradial symmetry and are triploblastic.
(ii) They bear two tentacles and eight longitudinal rows of ciliary comb-plates for locomotion.
(iii) They are marine, solitary or free-swimming.
(iv) They lack nematocysts but adhesive cells (colloblasts) are present.
Examples: Pleurobrachia (comb jelly) and Ctenoplana
APPEARS IN
संबंधित प्रश्न
Match the animals given under column A with their respective classification group given under column B
| Column A | Column B | ||
| 1 | Sponge | a | Amphibia |
| 2 | Snail | b | Reptilia |
| 3 | Butterfly | c | Echinodermata |
| 4 | Toad | d | Mollusca |
| 5 | Lizard | e | Arthropoda |
| 6 | Starfish | f | Porifera |
Main characteristics of Nematoda:
Give four general characters of phylum Mollusca. Write down two examples.
Name the phylum in which ambulacral system is present. What is its function?
Write down four characters of mammals. Give two examples.
Distinguish between polyp and medusa.
Write down four general characters of cnidarians (coelenterates). Give two examples.
Name major phyla of Animal kingdom. Write down one character and one example of each of them.
Give any one difference between the following :
Insecta and Arachnida
Give four important characters of mammals.
Give the name of two animals that belong to phylum echinodermata.
Give two examples of each of the following: Echinodermata
Give two examples of each of the following: Platyhelminthes
Fill in the blanks:
The excretory organs of platyhelminthes are ______.
Choose the correct answer: Multicellular producers are
Choose the correct answer: 'Systema naturae' has been written by
The binomial name of onion is ______.
What is binomial nomenclature?
Assertion (A): Reptiles are warm-blooded animals.
Reason (R): They have scales.
