iii. Filarial worm
b. Name the phylum to which it belongs. (½)
c. Mention its mode of nutrition (½)
d. What is the coelomic condition of other organisms? Substantiate your answer. (1)
2. During a seashore visit, a student collected two organisms. Observing the morphology, it is clear that the organisms are radially symmetrical. One of them shows bioluminescence.
a. To which phylum does this organism belong? (1)
b. Identify the possible phyla to which the other organism can be included. (1)
c. Which distinctive feature of this organism will help you to categorize it into a particular phylum? (1)
1. Observing starfish in a marine aquarium your friend commented that it is a lower invertebrate without distinct head, eyes and legs. Do you agree with him? Evaluate his statement with reasons. (2 Score)
2. The following are the key characteristics of an animal group. (2)
* Circular and sucking mouth without jaws.
* Fish-like body without scales and paired fins.
a. Name the class in which this animal belongs.
b. Give two examples from this class.
3. Frogs, Salamanders, Tortoise and Crocodiles are seen in both water and land. But they are classified into two different classes of the phylum vertebrata. Evaluate this classification comparing salient features of each class. (2)
1. “All vertebrates are chordates but all chordates are not vertebrates.” Evaluate and substantiate the statement. (2)
2. Name the distinctive character (responsible for their names) of the following animal groups.
a. Cnidaria b. Arthropoda c. Porifera
d. Annelida e. Chordata f. Ctenophora (3)
Your Biology teacher exhibited a laboratory specimen in the classroom. Based on which features will you distinguish it as a chordate or a non-chordate? (3)
1. Find the relationship between first pair and fill in the blank.
a. Salamander: Amphibia Chameleon:…………… (1)
2. In your practical, the class teacher brought the following preserved animals.
a. Balanoglossus b. Pila
c. Tapeworm d. Physalia
Identify the phylum of each animal and select a distinguishing character of each phylum from the flowing table: (4)
1. Presence of comb plates
2. Presence of Flame cells
3. Presence of Radula
4. Presence of Malpighian tubules
5. Presence of Proboscis gland
6. Presence of Cnidocytes
7. Presence of Notochord
1. Prawns and insects are included in phylum Arthropoda while they have different habits and habitats. Justify your answer. (1)
2. Figures (X) and (Y) are the fish of two different classes. Identify them and differentiate between these classes. (2)
3. Birds are well adapted for flying. Give any three of such adaptations. (3)
All vertebrates are chordates, but all chordates are not vertebrates. Justify this statement with an example.
1. Observe the following features of animals and answer the following questions. (1)
· Moist skin
· Hooks and suckers
· Pneumatic bones
· Dry and non-glandular skin
a. Select the flight adaptation of birds.
b. Select the amphibious adaptation of frog.
2. Assign the following features of animals given in column A to the most appropriate animal phylum given in column B.
b) Spiny endoskeleton
c) Comb plates
d) Flame cells
3. The diagrammatic sketch given below represents a hypothetical chordate.
a. If you find any mistakes in the labelled parts, copy the diagram and make necessary corrections in the labelling.
b. Based on any two labelled parts in the diagram, mention how this phylum differs from non-chordates. (3)