Advertisements
Advertisements
प्रश्न
Give four general characters of phylum Mollusca. Write down two examples.
Advertisements
उत्तर
General characteristics of phylum Mollusca:
(i) They have a soft, bilaterally symmetrical body with little segmentation and without appendages. Body cavity is haemocoel.
(ii) Body is divisible into an anterior head, a ventral foot and a dorsal visceral mass. The entire body is covered by a thin fold of skin called mantle, which secretes a hard calcareous shell of one or more pieces.
(iii) Respiration occurs via gills, mantle or a "lung" of the mantle.
(iv) Sexes are usually separate.
Examples: Chiton and Pila.
APPEARS IN
संबंधित प्रश्न
What are the differences between amphibians and reptiles?
How are the criteria for deciding divisions in plants different from the criteria for deciding the subgroups among animals?
Prepare a list of some animals that are found parasitic on human beings.
Write one difference between the following pair:
Invertebrates and Vertebrates
Write down four characteristics of Ctenophora and give two examples.
What do you mean by the term triploblastic animals? Give two example.
Write down four main characters of chordates.
Explain general characteristics of phylum Platyhelminthes and Nematoda. Give two examples of each.
Name major phyla of Animal kingdom. Write down one character and one example of each of them.
What are the group names of the following categories of animals?
Animals with a hairy skin ___________
Given below is an animal followed by three terms or features. Underline the term which does not match with the animal.
Bat - Aves, Mammalia, Chordata
Match the names of animal groups in Column I with the names of animals in column II.
|
Column I (Group) |
Column II (Animals) |
|
Annelida |
Pigeon |
|
Porifera |
Snake |
|
Mollusca |
Earthworm |
|
Reptilia |
Sponge |
|
Amphibia |
Octopus |
|
Pisces |
Trout |
|
Mammal |
Rabbit |
Which names are left out that do not match and why?
Give four important characters of mammals.
Write two main characters of the following animal and name the phylum it belongs to: Whale
Choose the correct answer: The animal of class pisces is
Choose the correct answer: Binomial Nomenclature was proposed by
The binomial name of onion is ______.
Assertion (A): Reptiles are warm-blooded animals.
Reason (R): They have scales.
Give scientific reasons.
Body temperature is not constant in amphibians.
Assertion (A): All vertebrates are chordates but all chordates are not vertebrate.
Reason (R): The members of subphylum vertebrata possess notochord, during the embryonic period, the notochord is replaced by a cartilaginous or bony vertebral column in adults.
In the light of the above statements, choose the correct answer from the options given below:
