Question 15 Marks
What is amphibian? Describe its main symptoms. Write the biological names of the following-(i) Toad, (ii) Frog, (iii) Tree frog, (iv) Limbless amphibian.
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Question 25 Marks
Which phylum do they belong to? Describe the general characteristics of that phylum. Write the popular names of the following: (i) Pila, (ii) Pinctada, (iii) Aplysia, (iv) Octopus.
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Question 35 Marks
What is meant by Reptilia? Describe its general symptoms. Write the zoological names of the following: (i) Garden lizard, (ii) Cobra, (iii) Tree lizard, (iv) Domestic lizard, (v) Crocodile.
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Question 45 Marks
Make a labelled diagram of horse fish (Hippocampus). Write a note on Chondrichthyes and Osteichthyes.
Answer
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Question 55 Marks
What is meant by coelenterata? Write the main characteristics of Coelenterata and make a labelled diagram of Aurelia and Adamsia.
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Question 65 Marks
Write short notes on the following: (i) Symmetry, (ii) Coelom, (iii) Segmentation, (iv) Bicore and tricore organization.
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Question 75 Marks
Write the main characteristics of phylum Porifera. While classifying it, give an example of each category.
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Question 85 Marks
Describe the main characteristics of Aves class and write the names of two birds which cannot fly and make labelled diagram of any one.
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Question 95 Marks
Mention four main characteristics of phylum Annelida and Coelenterata. Write the scientific names of two animals each.
Answer
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Question 105 Marks
Describe the main characteristics of Arthropoda phylum and make labelled diagrams of any two animals.
Answer
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Question 115 Marks
Describe the important characteristics of Mammal class and make a labelled diagram of bat.
Answer
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Question 125 Marks
Name the following:
1. Limbless animal
2. Poikilothermic animal
3. Homeothermic animal
4. Animals with two chambered heart
5. Animals with four chambered heart
6. Animal with dry horny skin
1. Limbless animal
2. Poikilothermic animal
3. Homeothermic animal
4. Animals with two chambered heart
5. Animals with four chambered heart
6. Animal with dry horny skin
Answer
View full question & answer→1. Limbless animal - Snake
2. Poikilothermic animal. - Frog
3. Homeothermic animal - Pigeon
4. Animals with two chambered heart - Fishes
5. Animals with four chambered hear - human
6. Animal with dry horny skin - Chameleon
2. Poikilothermic animal. - Frog
3. Homeothermic animal - Pigeon
4. Animals with two chambered heart - Fishes
5. Animals with four chambered hear - human
6. Animal with dry horny skin - Chameleon
Question 135 Marks
Make a labelled diagram of Balanoglossus. Write five characteristics of phylum Hemichordata.
Question 145 Marks
Write the common names of the following:
1. Euspongia,
2. Antedon,
3. Exocoetus,
4. Hippocampus,
5. Laccifer, 6. Aplysia,
7. Scoliodon,
8. Hyla,
9. Pristis,
10. Adamsia.
1. Euspongia,
2. Antedon,
3. Exocoetus,
4. Hippocampus,
5. Laccifer, 6. Aplysia,
7. Scoliodon,
8. Hyla,
9. Pristis,
10. Adamsia.
Answer
View full question & answer→| Zoological Name | Common Name |
| Euspongia | Bath sponge |
| Antedon | Sea lily |
| Exocoetus | Flying fish |
| Hippocampus | Sea horse |
| Laccifer | Lac insect |
| Aplysia | Sca-hare |
| Scoliodon | Dog fish |
| Hyla | Tree frog |
| Pristis | Saw fish |
| Adamsia | Sea anemone |
Question 155 Marks
Write three specific characteristics of the phylum Annelida and name the four phyla in which the larval stage is found during development.
Answer
View full question & answer→The three following specific characteristics of the phylum Annelida are:
1. Their body surface is distinctly marked out into segments or metameres.
2. They possess longitudinal and circular muscles which help in locomotion. Aquatic annelids like Nereis possess lateral appendages, parapodia, which help in swimming
3. Presence of nephridia.
Following are the four phyla in which the larval stage is found during development:
(1) Phylum-Annelida
(2) Phylum-Arthropoda
(3) Phylum-Mollusca
(4) Phylum-Echinodermata.
1. Their body surface is distinctly marked out into segments or metameres.
2. They possess longitudinal and circular muscles which help in locomotion. Aquatic annelids like Nereis possess lateral appendages, parapodia, which help in swimming
3. Presence of nephridia.
Following are the four phyla in which the larval stage is found during development:
(1) Phylum-Annelida
(2) Phylum-Arthropoda
(3) Phylum-Mollusca
(4) Phylum-Echinodermata.
Question 165 Marks
Write any five differences between Chordata and Non-Chordata animals.
Answer
View full question & answer→Difference between Chordata and Non-Chordata animals:
| Chordates | Non-Chordates |
| 1. Notochord present. | 1. Notochord absent. |
| 2. Central nervous system is dorsal, hollow and single. | 2. Central nervous system is ventral, solid and double. |
| 3. Pharynx perforated by gill slits. | 3. Gill slits are absent. |
| 4. Heart is ventral. | 4. Heart is dorsal (if present). |
| 5. A post-anal part (tail) is present | 5. Post-anal tail is absent. |
Question 175 Marks
Write the names of the groups classified on the basis of body cavity. Write any two differences between Pseudocoelomate and Acoelomate.
Answer
View full question & answer→The phyla classified on the basis of body cavity are as follows: (i) Acoelomate - Platyhelminthes. (ii) Pseudocoelomate - Nemato helminthes (iii) Eucoelomate - Annelida.
Difference between Pseudocoelomate and Acoelomate :
Difference between Pseudocoelomate and Acoelomate :
| Pseudocoelomate | Acoelomate |
| 1. The animals in which pseudocavity is found are called Pseudocoelomate animals. | 1. The animals in which body cavity is not found are called acoelomate animals. |
| 2. Example: Animals of nemato helminths. | 2. Example: Animals of Platyhelminthes. |
| 3. Body cavity is found but is not lined with mesoderm, hence such a cavity is called Pseudocoelomate. | 3. Ectoderm and endoderm layers come close together, mesoglia is filled between them, hence no cavity is formed. Hence it is called acoelomate. |
Question 185 Marks
Explain the difference between a lizard and a snake.
Answer
View full question & answer→Difference between lizard and snake:
| Lizard | Snake |
| 1. Two pairs of legs are found in these. | 1. Whereas they lack legs. |
| 2. Eye lids move. | 2. Eye lids are immovable in these. |
| 3. Urinary bladder is found in these. | 3. Whereas there is absence of urinary bladder. |
| 4. The jaw bones are immovable. | 4. Whereas in these the jaw bones are movable. |
| 5. The tongue is not divided. | 5. The tongue is divided. |
| 6. Nictitating membrane is present. | 6. Whereas the nictitating membrane is absent in snakes. |
Question 195 Marks
Write the main characteristics of phylum Ctenophora.
Answer
View full question & answer→The main characteristics of phylum Ctenophore are as follows:
1. Ctenophores, commonly known as sea walnuts or comb jellies.
2. They are exclusively marine, radially symmetrical, diploblastic organisms with tissue level of organisation
3. The body bears eight external rows of ciliated comb plates, which help in locomotion.
4. Digestion is both extracellular and intracellular.
5. Bioluminescence (the property of a living organism to emit light) is well-marked in ctenophores.
6. Sexes are not separate.
7. Reproduction takes place only by sexual means.
8. Fertilisation is external with indirect development.
9. Examples : Pleurobrachia and Ctenoplana.
1. Ctenophores, commonly known as sea walnuts or comb jellies.
2. They are exclusively marine, radially symmetrical, diploblastic organisms with tissue level of organisation
3. The body bears eight external rows of ciliated comb plates, which help in locomotion.
4. Digestion is both extracellular and intracellular.
5. Bioluminescence (the property of a living organism to emit light) is well-marked in ctenophores.
6. Sexes are not separate.
7. Reproduction takes place only by sexual means.
8. Fertilisation is external with indirect development.
9. Examples : Pleurobrachia and Ctenoplana.
Question 205 Marks
Write the names of the excretory organs of the followinganimals: (i) Flatworms, (ii) Earthworm, (iii) Cockroach, (iv) Hydra, (v) Balanoglossus, (vi) Rat.
Answer
View full question & answer→Name of the animal and their excretory organ:
(i) Flatworm - Flame cells
(ii) Earthworm - Nephridia
(iii) Cockroach - Malpighian tubules
(iv) Hydra - Body surface
(v) Balanoglossus - Proboscis gland
(vi) Rat - Kidney
(i) Flatworm - Flame cells
(ii) Earthworm - Nephridia
(iii) Cockroach - Malpighian tubules
(iv) Hydra - Body surface
(v) Balanoglossus - Proboscis gland
(vi) Rat - Kidney
Question 215 Marks
Write the main characteristics of Chondrichthyes fishes.
Answer
View full question & answer→Following are the main characteristics of Chondrichthyes fishes:
1. The members of this class are marine
2. Their endoskeleton is cartilaginous.
3. The external skeleton is made of placoid scales.
4. 5-7 pairs of gill slits are found in them.
5. Operculum is absent on gill cracks.
6. J-shaped stomach is found in them and spiral valve is found in their intestine.
7. Clasper is found as sexual organ in male animals.
8. Heat receptors called ampulla of Lorenzini are found on the dorsal side of the head of this group of fish.
9. Two chambers are found in the heart, one atrium and one ventricle. Apart from these, venules and cone arteriosus are found in the heart.
10. They have internal fertilisation and many of them are viviparous. Examples Scoltodon (Dog fish), Pristis (Saw fish), Carcharodon (Great white shark). Trygon (Sting ray).
1. The members of this class are marine
2. Their endoskeleton is cartilaginous.
3. The external skeleton is made of placoid scales.
4. 5-7 pairs of gill slits are found in them.
5. Operculum is absent on gill cracks.
6. J-shaped stomach is found in them and spiral valve is found in their intestine.
7. Clasper is found as sexual organ in male animals.
8. Heat receptors called ampulla of Lorenzini are found on the dorsal side of the head of this group of fish.
9. Two chambers are found in the heart, one atrium and one ventricle. Apart from these, venules and cone arteriosus are found in the heart.
10. They have internal fertilisation and many of them are viviparous. Examples Scoltodon (Dog fish), Pristis (Saw fish), Carcharodon (Great white shark). Trygon (Sting ray).