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Here's the question.
a). Explain evolution in Aves.
b). Explain the features or characteristics Hemichordata.
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➰➰➰hello buddy here's ur answer❕❕❕
A. Evolution in Aves: .,
⏺ Initially about in 100 million years ago before, the survival of other organism, Aves or the order primatan members were evolved.
⏺The member of these class, had 4 limbs, where they used the front one for climbing and jumping, other two for holding and hanging, ,,
⏺but initially the aves doesnt used the back bone or spinal cord,, for the strentgh, but according to DARWINS THEORY, , after using the another organ, it being gets modified, as on case of snakes(limbs), hence as a reslut of evolution, and the use of bone, they were able to stand as we do ,,, NOW!!
B. General characters of Hemichordata
1. Solitary and colonial, mostly tubicolous, exclusively marine.
2. Body soft, fragile, vermiform and divisible into proboscis, collar and trunk.
3.Body wall with single layered epidermis.
4.Coelom, enterocoelus,divisible into protocoel,mesocoel and metacoel.
5. Buccal diverticulum, earlier considered as notochord, present in the proboscis.
6. Digestive tract complete; in the form of straight or U-shaped tube.
❤❤hope it helps you❤
A. Evolution in Aves: .,
⏺ Initially about in 100 million years ago before, the survival of other organism, Aves or the order primatan members were evolved.
⏺The member of these class, had 4 limbs, where they used the front one for climbing and jumping, other two for holding and hanging, ,,
⏺but initially the aves doesnt used the back bone or spinal cord,, for the strentgh, but according to DARWINS THEORY, , after using the another organ, it being gets modified, as on case of snakes(limbs), hence as a reslut of evolution, and the use of bone, they were able to stand as we do ,,, NOW!!
B. General characters of Hemichordata
1. Solitary and colonial, mostly tubicolous, exclusively marine.
2. Body soft, fragile, vermiform and divisible into proboscis, collar and trunk.
3.Body wall with single layered epidermis.
4.Coelom, enterocoelus,divisible into protocoel,mesocoel and metacoel.
5. Buccal diverticulum, earlier considered as notochord, present in the proboscis.
6. Digestive tract complete; in the form of straight or U-shaped tube.
❤❤hope it helps you❤
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