On the other hand, the animals in which the body cavity is not lined by mesoderm are known as pseudocoelomates. Question 10: How important is the presence of air bladder in Pisces? They are triploblastic, coelomate, bilaterally symmetrical with chitinous exoskeleton. They have an outer ectoderm and an inner endoderm. Similarly, two or three embryonic layers are taken for grouping the animals under diploblastic and triploblastic categories. Animal Kingdom involves all animals in the world. Phylum — Chordata · Presence of notochord dorsal hollow spinal cord —nerve cord and paired pharyngeal gill slits · Bilaterally symmetrical and triploblastic · Coelomate organ system level of organization · Have post and tail · Closed circulatory system Chordates Non chordates 1.
What is the System of Classification of Animal Kingdom? Aschelminthes round worms · Acoclomate — no body cavity - Ex. Illustration: Arthropods, Chordates, and so forth. Vectors — Anopheles, Ades, Culex mosquito. There are a wide range of animals which are comparative and distinctive to each other in numerous angles. Thus, it can be said that all vertebrates are chordates but all chordates are not vertebrates.
. · Bones are pneumatic bones air cavities helps to make the body light. They have dorsiventrally flattened body and bear hooks and suckers to get attached inside the body of the host. This feature helps us in grouping the animals among chordates and non-chordates. Answer 3: Coelom is a fluid filled space between the body wall and digestive tract.
The Animal Kingdom Class 11 Notes is given here. Circulatory system a Open type- No blood vessels, blood flows in sinuses. · Sexes are separate · Oviparous · Fertilization is external and development is indirect with tadpole larva Ex. Question 14: Match the following: Answer Question 15: Prepare a list of some animals that are found parasitic on human beings. Digestive enzymes are secreted by special cells into the cavity of alimentary canal. It occurs in unicellular organisms.
It consists of an array of radiating channels, tube feet, and madreporite. Answer 11: Birds have undergone many structural adaptations to suit their aerial life. It occurs in most of the invertebrates and amphibians. Class — Amphibia - dual life · Live on land and move to water for breeding · Body has head and trunk · Tail is in larval stage — two paires of limbs · Digits without claws. Hard exoskeleton made of chitin that protects the body iii. How are they different from viviparous animals. What are the difficulties that you would face in classification of animals, if common fundamental features are not taken into account? Heart three chambered, Crocodile 4-chambered.
This is your solution of Coelentrata - Animal Kingdom, Biology, Class 11 search giving you solved answers for the same. Spine or notochord is the detectable component which characterizes whether the animal is vertebrate or invertebrate. Answer The characteristic features of the phylum, Chordata, include the presence of a notochord and paired pharyngeal gill slits. Question 8: Water vascular system is the characteristic of which group of the following: a Porifera b Ctenophora c Echinodermata d Chordata Answer 8: Water vascular system is a characteristic feature of the phylum, Echinodermata. Hence, a smaller number of offsprings are produced by viviparous animals.
Some of these adaptations are as follows. Question 3: How useful is the study of the nature of body cavity and coelom in the classification of animals? Figure showing germinal layers: a Diploblastic b Triploblastic Nature of Coelom The appearance or nonappearance of a body cavity in between the gut wall and the body wall is critical trademark for classification. Diploblastic Animals — Such animals in which the cells are orchestrated in two embryonic layers are called Diploblastic animals. Example Marine- Hippocampus Sea horse , Exocoetus Flying fish. Through this chapter, concepts of Basis of Classification, Levels of Organisation, Symmetry, Diploblastic and Triploblastic Organisation, Coelom, Segmentation, Notochord, Classification of Animals, Phylum — Porifera, Phylum — Coelenterata Cnidaria , Phylum — Ctenophora, Phylum — Platyhelminthes, Phylum — Aschelminthes, Phylum — Annelida, Phylum — Arthropoda, Phylum — Mollusca, Phylum — Echinodermata, Phylum — Hemichordata and Phylum — Chordata will be learnt. Answer Coelom is a fluid filled space between the body wall and digestive tract.
Body plan · Cell aggregate plan · Blind sac body plan 5. Levels of Organization Every one organisms of the Animal kingdom is multicellular still they don't display the same example of cell organization. Larva of Obelia — Planula free living and scyphistoma larva fixed polyp like. Question 4: Distinguish between intracellular and extracellular digestion? The course of action of body parts around a main line or point decides the symmetry. Aschelminthes is an example of pseudocoelomates. These features are used as the basis of animal classification and some of them are discussed in this chapter. Heart is two chambered, cold blooded Poikilothermous.
If only a single characteristic is considered, then this objective would not be achieved. · Pseudococlomate — no mesoderm, have only ectoderm and enderm layers - Ex. Internal fertilisation, vivipary exception Platypus. Arthropoda Organ- system Bilateral Coelomate Present Complete Present Present Exoskeleton of cuticle, jointed appendages. Question 12: Could the number of eggs or young ones produced by an oviparous and viviparous mother be equal? Moreover, the arthropods are the earliest among the animals with well developed organ system. These are carnivorous animals — The animals move by cilia, which join together to form comb plates, there are eight median comb plates forming locomotory organs. Larva return to seas after metamorphosis.
It occurs in most of the invertebrates and amphibians. Asymmetrical - a few animals can't be partitioned into two equivalent parts along any plane going through the focal point of the organism. Answer 2: There is a certain common fundamental feature that helps in classification of living organisms. Animal Kingdom Class 11 Notes - Chapter 4 Animal kingdom is one of the kingdoms among five kingdom scheme of classification by Whittaker and comprises of multicellular eukaryotic animals. · No operculum · Mouth in ventral with teeth.