9th Class Science Diversity in Living Organisms Question Bank 9th CBSE Science Diversity in Living Organisms

Distinguish between the five classes of vertebrates on the basis of characters like habitat, kind of exoskeleton, respiratory organs and other distinct features.

Answer:

Differences between Pisces, Amphibia, reptilian, Aves and Mammals are as follows.

Character Pisces Amphibia Reptilia Aves 18. Mammals

1. Habitat Aquatic Terrestrial and aquatic Terrestrial Arboreal Terrestrial, aquatic and arboreal

2. Exoskeleton Slimy scales Absent Dry and scaly Feathers, claws Hair, nails, etc.

3. Respiratory organs Gills Gills, lungs and skin Lungs Lungs Lungs

4. Body temperature Cold- blooded Cold-blooded Cold- blooded Warm- blooded Warm- blooded

5. Heart 2-chambered 3-chambered 4-chambered 4-chambered 4-chambered

6. Locomotary organs Fins Limbs Limbs; but absent in snakes. Wings and Limbs Limbs

7. Others Body is streamlined. They are oviparous. They have webbed feet. Eggs are laid in water and larvae are aquatic. They are oviparous and some are viviparous, e.g., lizard and snake. Development is external. Body is covered by feathers and forelimbs are modified into wings. Their bones are hollow. Presence of mammary glands. There are hairs on the body and external pinna is also present. They are viviparous.

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Character	Pisces	Amphibia	Reptilia	Aves	18. Mammals
1. Habitat	Aquatic	Terrestrial and aquatic	Terrestrial	Arboreal	Terrestrial, aquatic and arboreal
2. Exoskeleton	Slimy scales	Absent	Dry and scaly	Feathers, claws	Hair, nails, etc.
3. Respiratory organs	Gills	Gills, lungs and skin	Lungs	Lungs	Lungs
4. Body temperature	Cold- blooded	Cold-blooded	Cold- blooded	Warm- blooded	Warm- blooded
5. Heart	2-chambered	3-chambered	4-chambered	4-chambered	4-chambered
6. Locomotary organs	Fins	Limbs	Limbs; but absent in snakes.	Wings and Limbs	Limbs
7. Others	Body is streamlined. They are oviparous.	They have webbed feet. Eggs are laid in water and larvae are aquatic.	They are oviparous and some are viviparous, e.g., lizard and snake. Development is external.	Body is covered by feathers and forelimbs are modified into wings. Their bones are hollow.	Presence of mammary glands. There are hairs on the body and external pinna is also present. They are viviparous.

9th Class Science Diversity in Living Organisms Question Bank 9th CBSE Science Diversity in Living Organisms

question_answer Distinguish between the five classes of vertebrates on the basis of characters like habitat, kind of exoskeleton, respiratory organs and other distinct features.

Distinguish between the five classes of vertebrates on the basis of characters like habitat, kind of exoskeleton, respiratory organs and other distinct features.