Home
Class 11
BIOLOGY
Cephalopods show several unique or advan...

Cephalopods show several unique or advanced features when compared to the other molluscs. Discuss briefly.

Text Solution

Verified by Experts

The class cephalopoda includes cuttle fishes, squids, octopuses, nautilus etc.
2) Head is discrete and bears very conspicuous eyes.
3) Shell is either present (e.g. : Sepia) or absent (e.g. : Octopus). When present it may be multi chambered and external (e.g. : Nautilus) or internal (e.g. : Loligo).
4) Foot is modified into eight to ten arms (tentacles) present around the mouth and siphons."
5) Some Cephalopods (e.g : Sepia) possess an ink gland, as a defensive adaptation.
6) Ctenidia are two or four in number - dibran-chiates. e.g. : Sepia and tetrabranchiates. (e.g. : nautilus)
7) Brain is complex and is protected in a cartilaginous cranium.
8) Eyes are superficially similar to those of vertebrates.
9) Development is direct.
Promotional Banner

Topper's Solved these Questions

  • ANIMAL DIVERSITY - I

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise LONG ANSWER TYPE QUESTONS |2 Videos

  • ANIMAL DIVERSITY - I

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise IMPORTANT QUESTIONS |15 Videos

  • ANIMAL DIVERSITY - I

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise IMPORTANT QUESTIONS |15 Videos

  • ANIMAL DIVERSITY - II (CHORDATES)

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise IMPORTANT QUESTIONS |23 Videos

Similar Questions

Explore conceptually related problems

Unique feature of molluscs is

What is the unique feature of cells of nervous tissue as compared to other body cells ?

Unique feature of secondary growth in dicot root when compared with the stem is

Animals exhibiting which level of organisation lead relatively more efficient way of life when compared to those of the other levels of organisation? Why?

Study the following statements I) The simple count of number of species in an area shows the alpha diversity II) Beta diversity means the unique species in an ecosystem in comparison to other III) The more is the species richness the more is the evenness always. In the above statements

Collect the information about reactivity of VIIA group elements ( noble gases ) from internet or from your school liberary and prepare a report in their special character when compared to other elements of periodic table .

A six faced baised die when thrown shows an even number twice as compared to an odd number. If the die is thrown twice, the probability that the sum of the two numbers is even is

What is the uniqueness about the first two pairs of cephalic appendages of a crustacean compared to those of the other extant arthropods ?