Question
Give four general characters of phylum Mollusca. Write down two examples.
✓
Answer
- Body is soft, bilaterally symmetrical, with little segmentation and without appendages. The size of body varies from a microscopic to a giant form such as Octopus of upto 50 feet.
- Body cavity is haemocoel. True coelom is reduced and restricted to the pericardial cavity and the lumen of gonads and nephridia.
- Digestive tract has a simple structure.
- Sexes are usually separate.
Example: Octopus and Sepia.
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
Differentiate between acute and chronic diseases.
Explain how does vaccine work?
Write down differences between nucleus and nucleoid.
Differentiate between blood and lymph.
Describe blood as a connective tissue.
- Identify the figure. What is its function?
- Label V and W.
- Label X, Y and Z.
- W loses its nucleus in the mature state, still it remains alive. Explain how?
What is the procedure of providing distinct and proper names to organisms?
Name the tissue, which helps in transportation of oxygen that we inhale to various parts of the body. Write the composition of this tissue.
Define the following terms:
- Cell inclusions.
- Cytosol.
- Protoplasm.
- Nucleoplasm.
Briefly explain depletion of ozone layer and its effects.