Class 11 Biology Important Chapter 4 Animal Kingdom

Class 11 Biology Important Chapter 4 Animal Kingdom Solutions English Medium As Per AHSEC New Syllabus to each chapter is provided in the list so that you can easily browse through different chapters ASSEB Class 11 Biology Important Solutions and select need one. AHSEC Class 11 Biology Additional Notes English Medium Download PDF. HS 1st Year Biology Important Solutions in English.

Class 11 Biology Important Chapter 4 Animal Kingdom

Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. ASSEB Class 11 Biology Additional Question Answer are part of All Subject Solutions. Here we have given HS 1st Year Biology Important Notes in English for All Chapters, You can practice these here.

Animal Kingdom

Chapter: 4

IMPORTANT QUESTION AND ANSWER

Very Short and Short Answer Type Question: 

1. What makes the skeleton of poriferans.

Ans. Spongin fibers.

2. Name one cnidarian that has both polyps and medusa.

Ans. Obelia.

3. Why are phylum Platyhelminthes known as flatworms?

Ans. They have dorsoventrally flat bodies.

4. Write two important characters of Arthropods. 

Ans. (i) Body is jointed outwardly and bilaterally symmetrical.

(ii).A hard, non-living exoskeleton present.

5. Define the term poikilothermous.

Ans: The cold blooded animals who chang their body temperature according the surroundings (do not possess constant body temperature) are know as poikilothermous animals.

6. On the basis of presence of Jaws sub-phylum Vertebrata is divided into them. two super-classes, name them.

Ans: (i) Super class : Agnatha.

(ii) Super class : Gnathostomata.

7. Name the organs of defence in Paramoecium.

Ans: Trichocysts are organs of defence in unicellular Paramoecium.

8. Define Polymorphism.

Ans: The phenomenon when an organism have different kinds of zooids for different functions.

9. What are flame cells and where are they found ?

Ans. They are excretory organs (cells) found in members of phy. Platyhelminthes and related animals which possess flickering cilia or flagella for driving the absorbed excretory products into a system of ducts.

10. What is meant by the term “Metamerism”?

Ans. In some Bilateria, the body consists of many segments or portions. It shows serial repetition of parts, e.g., earthworm. This type of seg-mentation is called metameric segmentation and the phenomenon is called metamerism.

11. Define notochord.

Ans. Notochord is “a solid, cylindrical, rod like structure formed or vacuolated cells present in the mid dorsal body axis of the chordates present at some stage of their life history”.

12. Explain canal system in sponges.

Ans: Canal System:

(i) Sponges have water transport or canal system.

(ii) Water enters through inhalant pores called ostia into a central cavity / Spongocoel and comes out from exhalent pores known as oscula.

(iii) The canal system helps the sponge in nutrition, respiratory exchange, excretion and reproduction.

13. Mention any four features present in animals belonging to phylum Echino-dermata.

Ans: Four Main features of Animals belonging to Phylum Echinodermata:

(i) Called spiny bodied animals which are exclusively marine.

(ii) Triploblastic, coelomate having water vascular system in them.

(iii) Locomotion by tube feet occurs.

(iv) Radially symmetrical animals e.g.. Asterias, Echinus, Antedon and Cucumaria etc.

14. Mention any four features present in animals belonging to phylum porifera.

Ans. Four Features present in animals belonging to Phylum Porifera :

(i) Mostly called the sponges that have cellular grade of organisation.

(ii) They possess a central cavity called the spongocoel that opens to outside by osculum.

(iii) Poriferas are called pore bearers since their bodies are perforated by pores or ostia.

(iv) They have a skeleton made of spicules or spongin fibres e.g. Euspongia, Sycon and Spongilla etc.

15. Write at least four identifying features of phylum Arthropoda. Give four different examples of it.

Ans. Four Identifying Features of Phylum Arthropoda:

(i) Animals having jointed appendages.

(ii) Triploblastic, coelomate and bilaterally symmetrical animals.

(iii) Body is covered by chitinous cuticle and segments are not separated by septa.

(iv) Arthropods are unisexual animals.