17. In Annelids, serial segmentation is the key characteristic feature. 18. Chaetae, the chitin based structures are used for the process of locomotion in annelids. 19. Ecdysozoa animals show molting, so Athropods are considered as Ecdysozoa. 20. Ossicles are part of the endoskeleton. The other given options belong to water vascular system. 21. Lophophore, a feeding structure of the Bryozoans are not present in Brachipodia. 22. Axon is surrounded by myelin sheath. It forms the electrically insulating layer. 23. Schwann cells myelinate the peripheral neurons wheras oligodendrocytes myelinate the CNS neurons. 24. Inhibitory neurotransmitters makes the ligand gated potassium ion channel to open which leads to hyperpolarization of postsynaptic membranes. Solution 17. In Annelids, serial segmentation is the key characteristic feature. 18. Chaetae, the chitin based structures are used for the process of locomotion in annelids. 19. Ecdysozoa animals show molting, so Athropods are considered as Ecdysozoa. 20. Ossicles are part of the endoskeleton. The other given options belong to water vascular system. 21. Lophophore, a feeding structure of the Bryozoans are not present in Brachipodia. 22. Axon is surrounded by myelin sheath. It forms the electrically insulating layer. 23. Schwann cells myelinate the peripheral neurons wheras oligodendrocytes myelinate the CNS neurons. 24. Inhibitory neurotransmitters makes the ligand gated potassium ion channel to open which leads to hyperpolarization of postsynaptic membranes..

1. 17. In Annelids, serial segmentation is the key characteristic feature.
18. Chaetae, the chitin based structures are used for the process of locomotion in annelids.
19. Ecdysozoa animals show molting, so Athropods are considered as Ecdysozoa.
20. Ossicles are part of the endoskeleton. The other given options belong to water vascular
system.
21. Lophophore, a feeding structure of the Bryozoans are not present in Brachipodia.
22. Axon is surrounded by myelin sheath. It forms the electrically insulating layer.
23. Schwann cells myelinate the peripheral neurons wheras oligodendrocytes myelinate the CNS
neurons.
24. Inhibitory neurotransmitters makes the ligand gated potassium ion channel to open which
leads to hyperpolarization of postsynaptic membranes.
Solution
17. In Annelids, serial segmentation is the key characteristic feature.
18. Chaetae, the chitin based structures are used for the process of locomotion in annelids.
19. Ecdysozoa animals show molting, so Athropods are considered as Ecdysozoa.
20. Ossicles are part of the endoskeleton. The other given options belong to water vascular
system.
21. Lophophore, a feeding structure of the Bryozoans are not present in Brachipodia.
22. Axon is surrounded by myelin sheath. It forms the electrically insulating layer.
23. Schwann cells myelinate the peripheral neurons wheras oligodendrocytes myelinate the CNS
neurons.
24. Inhibitory neurotransmitters makes the ligand gated potassium ion channel to open which
leads to hyperpolarization of postsynaptic membranes.