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| ===Notes for teachers=== | | ===Notes for teachers=== |
− | ''These are short notes that the teacher wants to share about the concept, any locally relevant information, specific instructions on what kind of methodology used and common misconceptions/mistakes.'' | + | #'''Fishes are the first to evolve as vertebrates''' |
− | #Fishes are the first to evolve as vertebrates
| + | #'''They complete their life cycle only in aquatic medium,hence they use gills for respiration and fins for locomotin in water and have gelatinous scales for easy gliding in water.''' |
− | #They complete their life cycle only in aquatic medium,hence they use gills for respiration and fins for locomotin in water and have gelatinous scales for easy gliding in water. | + | #'''Two chambered heart facilitates one way blood circulation,so that oxygenated and deoxygenated blood circulates in a common channel.''' |
− | #Two chambered heart facilitates one way blood circulation,so that oxygenated and deoxygenated blood circulates in a common channel. | + | #'''They are stenothermal and can adapt to wide range of temperature.''' |
− | #They are stenothermal and can adapt to wide range of temperature. | + | #'''Both fertilization and foetus development are external ,and are unisexual.''' |
− | #Both fertilization and foetus development are external ,and are unisexual. | |
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| ===Activities=== | | ===Activities=== |