Please help with these biology questions?

1. a pouchlike pharynx: tunciates::

a) spinal column: vertebrates
b) dorsal nerve cord: humans
c) coelom: invertebrates
d) notochord: lancelets

(I thought it was B)

2. birds: dinosaurs

a) mammals: dinosaurs
b) amphibians: birds
c) amphibians: reptiles
d) mammals: therapsids

(I thought it was C)

3. bird: hallow bones::

a) amphibian: feathers
b) reptile: hallow bones
c) archaeopteryx: feathers
d) bird: dinosaur forelimbs

(I thought it was C)

4. radical symmetry: many axes::

a) tissue: cells
b) blood: circulatory
c) gills: oxygen
d) excretion: elimination

(I thought it was B)
 
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