Question

write some characters of pisces reptilia and aves?​

Answer 1

Answer:

• They have notochords
• They have dorsal nerve cord
• They are triploblastic , three germ layers are present they are ectoderm , misoderm and endoderm
• They have paired gill pouches
• They are ceolomates

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Answer 2

Explanation:

Aves

→Warm blooded. tetrapodous vertebrates with various flight adaptations. →Size range from smallest humming bird to longest ostich bird.

→The characteristic feature -Presence of feathers. →Most of them can fly except flightless birds (e.g.ostrich)

→They possess beak. →The forelimbs modified in wings.

→The hind limbs generally have scales and are modified for walking, swimming or clasping the tree branches. →Skin is day without glands except the oil gland at the base of the tail. →Endoskeleton is fully ossified (bony)

→Long bones are hollow with air cavities (pneumatic)

→The digestive tract of birds has additional chambers, the crop and gizzard. →Heart is completely four chambered.

→They are worm blooded (homoiothermous) animals i.e. they are able to maintain a constant body temperature. →Respiration is by lungs

→air sacs connected to lungs supplement respration.