Important Questions Class 11 Biology Chapter 4 Animal Kingdom for CBSE

Important Questions for Class 11 Biology 4th Chapter Animal Kingdom MCQ, Very Short, Short Type, Long Type

CBSE Class 11 Important Questions for Class 11 Biology Chapter 4 Animal Kingdom all MCQ Type, Very Short Type, Assertion Reason Type, Case Study, Short Type and Long Type Questions with Answers by Expert. Important Questions for Section A, B, C, D Class 11 Biology Chapter 4.

  • MCQs

1) The origin of notochord is from ____

a) Ectoderm

b) Mesoderm

c) Endoderm

d) Mesoglea

2) Body cavity in sponges is called

a) Spongocoel

b) Ostia

c) Choanocytes

d) Osculum

3) Assertion: Cnidoblasts of Cnidaria are used for anchorage, defense and for the capture of prey.

Reason: Cnidoblasts contain the stinging capsules or nematocysts on the tentacles and the body.

a.) Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

b.) Both Assertion and Reason are correct and Reason is not the correct explanation for Assertion.

c.) If assertion is true but the reason is false.

d.) if both assertion and reason are false.

4) Bioluminescence is the property of a living organism to emit light which is well-marked in_________

a) Cnidaria

b) Ctenophores

c) Aschelminths

d) Annelida

5) Assertion: Tissue level is exhibited by members of Platyhelminthes and other higher phyla.

Reason: Tissues are grouped together to form organs, each specialized for a particular function.

a.) Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

b.) Both Assertion and Reason are correct and Reason is not the correct explanation for Assertion.

c.) If assertion is true but the reason is false.

d.) If both assertion and reason are false.

6) The most distinctive feature of echinoderms is the presence of water vascular system which helps in

a.) capture and transport of food

b.) locomotion

c.) respiration

d.) All the above

7.) Assertion: Aschelminths have specialized cells called flame cells

Reason: These cells help in respiration

a.) Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

b.) Both Assertion and Reason are correct and Reason is not the correct explanation for Assertion.

c.) If assertion is true but the reason is false.

d.) If both assertion and reason are false.

8.) What is the basis are the class pieces?

a.) presence or absence of jaws

b.) presence or absence ofair bladders

c.) internal and external fertilization

d.) all the above

9.) Examples of fishes having poison sting is

a.) Scoliodon

b.) Pristis

c.) Carcharodon

d.) Trygon

10.) Asterias (Star fish), Echinus (Sea urchin) are examples of

a) Mollusca

b) Arthropoda

c) Annelida

d) Echinodermata

11.) Exoskeleton of cuticle,jointed appendages is characteristic of

a) Mollusca

b) Arthropoda

c) Annelida

d) Echinodermata

12.) Worm-like withproboscis, collarand trunk is basis of classification of

a) Mollusca

b) Arthropoda

c) Hemichordate

d) Chordata

  • Answer in One Sentence

Q.1) State the features which can be used in classification.

Ans. Cell architecture, bodily symmetry, type of coelom, digestive, circulatory, and reproductive system patterns are some of the features which can be used in classification.

Q.2) Name the three germ layers in triploblastic organisms.

Ans. Animals have an external ectoderm and an internal endoderm. Between the ectoderm and the endoderm is the mesoderm.

Q.3) What is metamerism?

Ans. The body of several animals is divided into segments both externally and internally. The body of an earthworm, for example, displays a pattern known as metameric segmentation, and the phenomenon is known as metamerism.

Q.4) What are the distinguishing features of animals belonging to the phylum Chordata?

Ans. The existence of a notochord, a dorsal hollow nerve cord, and paired pharyngeal gill slits distinguishes animals belonging to the phylum Chordata.

Q.5) What are poikilothermous and homoiothermous organisms

Ans. poikilothermous animals are cold-blooded, which means they can’t control their body temperature. Homoiothermous are warm-blooded creatures, which means they can keep their body temperature constant.

Q.6) Give the body segmentation

Ans. The head, thorax, and abdomen make up the body of Arthropoda. They have appendages that are joined together (arthros-joint, poda-appendages).

Q.7) What is hypostome?

Ans. They have a single aperture in the center of their gastro-vascular cavity, and their mouth is hypostome.

  • Answer in Short

Q.1) Describe the two types of Circulatory system found in animals.

Ans. 1.) In open type of circulatory system blood is pumped directly from the heart to the cells and tissues.

2.) closed type of circulatory system is the one in which blood is circulated through a series of channels of varying widths like arteries, veins and capillaries.

Q.2) What basic forms are seen in cnidarians?

Ans. 1.) Polyp and medusa are the two primary body shapes seen in cnidarians.

2.) The polyp, like Hydra, Adamsia, and others, is sessile and cylindrical, whereas the medusa, like Aurelia or jelly fish, is umbrella-shaped and free-swimming.

3.) Polyps create medusae asexually, while medusae form the polyps sexually; those cnidarians that exist in both forms demonstrate alternation of generation (Metagenesis) (e.g., Obelia).

Q.3) State the peculiar features of class Mollusca with respect to shell, mantle cavity and radula.

Ans. 1.) A calcareous shell covers the body, which is unsegmented with a distinct head, muscular foot, and visceral hump.

2.) Over the visceral hump, a soft and spongy layer of skin forms a mantle.

3.) The mantle cavity is the region between the hump and the mantle, where feather-like gills can be found.

4.) They have the ability to breathe and excrete.

5.) Sensory tentacles can be found in the anterior head region.

6.) The radula, a file-like rasping organ in the mouth, is used for feeding.

Q.4) State features of Protochordate.

Ans.1.) Protochordates are marine animals belonging to the subphyla Urochordata and Cephalochordate.

2.) The notochord is only present in the larval tail of Urochordata, but it extends from the head to the tail area of Cephalochordate and is present throughout their lives.

  • Answer in Breif

1) How is the study of symmetry used in the classification of animals?

Ans.1.) The symmetry of animals can be used to classify them.

2) For example, Sponges are generally a symmetrical, which means that any plane passing through the center does not split them in two halves evenly.

3) Radial symmetry occurs when any plane travelling through the body’s central axis divides the organism into two identical halves.

4) This is the body plan of coelenterates, ctenophores, and echinoderms.

5) Bilateral symmetry is found in animals such as annelids, arthropods, and others whose bodies can be divided into identical left and right halves in just one plane.

2.) Give peculiar features of the class Mammalia.

Ans. 1.) Mammals reside in diverse habitat like Polar ice caps, deserts, mountains, woodlands, meadows, and dark tunnels etc.

2.) Some have evolved to be able to fly or live in water.

3.) The existence of milk producing glands (mammary glands), via which the young are nourished, is the most distinguishing mammalian trait.

4.) They have two pairs of limbs, one for walking and the other for running, climbing, digging, swimming, and flying.

5.) Mammalian skin is remarkable in that it has hair.

6.) External pinnae or ears are present.

7.) The jaw contains a variety of tooth kinds.

8.) The heart has four chambers.

9.) They are all the same temperature.

10.) Lungs are used to breathe.

11.) The sexes are segregated, and fertilization takes place internally. With a few exceptions, they are viviparous and direct development is seen.

Q.3) What levels of organization seen in animal kingdom?

Ans. 1.) The cells of sponges are grouped as loose cell aggregates, indicating that they have a cellular level of organization. Among the cells, there is some division of labour (activities).

2.) The cell arrangement in coelenterates is more complicated. The cells that perform the same function are grouped together into tissues, which is referred to as the tissue level of organization. 3.) Members of the Platyhelminthes and other higher phyla have an even higher degree of organization, namely the organ level, in which tissues are gathered together to form organs, each specialized for a certain function.

4.) Organs have been connected to form functional systems in organisms such as Echinoderms and Chordates, with each system dealing with a specific physiological role. The organ system level of organization is the name for this pattern.

5.) Diverse groups of animals have different patterns of complexity in their organ systems.

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