Phylum Nematoda, Annelida, Arthropoda - UNSOLVED PRACTICE SET
Chapter: Diversity in Living Organisms | Topic: Phylum Nematoda Annelida Arthropoda
PHYLUM NEMATODA, ANNELIDA, ARTHROPODA - UNSOLVED PRACTICE SET
Topic: Phylum Nematoda Annelida Arthropoda
Multiple Choice Questions
Q1. Roundworms belong to the phylum:
- Platyhelminthes
- Nematoda
- Annelida
- Arthropoda
Q2. The body of annelids is characterised by:
- A solid body with no cavity
- A false body cavity
- True segmentation (metamerism)
- No segmentation
Q3. The largest phylum in the animal kingdom is:
- Annelida
- Mollusca
- Arthropoda
- Chordata
Q4. Jointed appendages are a characteristic feature of:
- Annelida
- Arthropoda
- Nematoda
- Platyhelminthes
Q5. The body cavity of nematodes is called:
- Coelom
- Pseudocoelom
- Haemocoel
- Acoelom
Short Answer Questions
Q6. Describe the body structure of roundworms (Nematoda). Why are they called pseudocoelomates?
Q7. What is metamerism (true segmentation)? Explain with reference to earthworms.
Q8. List FIVE characteristic features of Phylum Arthropoda. Why is it considered the most successful phylum?
Q9. Differentiate between an open circulatory system and a closed circulatory system. Which phylum among Nematoda, Annelida, and Arthropoda has an open circulatory system?
Long Answer Questions
Q10. Compare the body symmetry, body cavity, circulatory system, and locomotion of Nematoda, Annelida, and Arthropoda in a tabular format. Draw labelled diagrams of representative organisms from each phylum.
Q11. Describe the economic importance of earthworms (annelids) in agriculture. How do they improve soil fertility? Explain the process of vermicomposting.
APPLICATION / ANALYSIS
Q12. A farmer in Kerala notices that his vegetable garden has poor soil quality and low crop yield. An agricultural officer suggests introducing earthworms into the soil.
(a) To which phylum do earthworms belong? What is their level of body organisation?
(b) How do earthworms improve soil structure and fertility? Explain THREE ways.
(c) The farmer also notices white grubs (beetle larvae) eating his plant roots. To which phylum do beetles belong? Are they beneficial or harmful in this context?
Q13. During the monsoon season in Delhi, there is a sudden increase in mosquito-borne diseases like dengue and malaria.
(a) To which phylum does the mosquito belong? List THREE characteristic features of this phylum.
(b) Mosquitoes have an open circulatory system. Explain what this means and how it differs from a closed circulatory system.
(c) A student suggests releasing dragonflies (which also belong to Arthropoda) to control mosquitoes. Is this a good biological control method? Explain why or why not.