Biology
Class 9
P S Verma
1
Chapter 1: Improvement in Food Resources
87 questions
2
Chapter 2: The Fundamental Unit of Life
31 questions
3
Chapter 3: Tissues
33 questions
4
Chapter 4: Diversity in Living Organisms
47 questions
Q1
Question 36:
Give four general characters of phylum Mollusca. Write down two examples.
Q2
Question 37:
Write down four general characters of phylum Echinodermata. Give two examples.
Q3
Question 38:
Write the scientific names of:
(a) Prawn;
(b) House fly;
(c) Star fish;
(d) Squid;
(e) Apple snail;
(f) Fresh water mussel.
View all question5
Chapter 5: Why Do We Fall Ill
15 questions
6
Chapter 6: Natural Resources
29 questions
Question
Question 37: Write down four general characters of phylum Echinodermata. Give two examples.
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Text solution
Verified
Answer:
General characteristics of phylum Echinodermata:
(i) Their body is triploblastic, coelomate, unsegmented and radially symmetrical.
(ii) Digestive system is usually complete. Excretory organs are absent and anus is absent in class Ophiuroidea.
(iii) Body wall is covered with spiny hard calcareous plates that form a rigid or flexible endoskeleton.
(iv) Body cavity is organised into water vascular system, which moves respiratory and locomotary organs.
Examples: Antedon and sea urchin (Echinus)
(i) Their body is triploblastic, coelomate, unsegmented and radially symmetrical.
(ii) Digestive system is usually complete. Excretory organs are absent and anus is absent in class Ophiuroidea.
(iii) Body wall is covered with spiny hard calcareous plates that form a rigid or flexible endoskeleton.
(iv) Body cavity is organised into water vascular system, which moves respiratory and locomotary organs.
Examples: Antedon and sea urchin (Echinus)
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| Question Text |
Question 37:
Write down four general characters of phylum Echinodermata. Give two examples.
|
| Topic | Diversity in Living Organisms |
| Subject | Science |
| Class | Class 9 |
| Answer Type | Text solution:1 |
| Upvotes | 60 |
