Animal 3 review answers
1)
a notochord and a dorsal, hollow nerve cord.
2) dorsal, hollow nerve
cord
3) a dorsal, hollow
nerve cord, pharyngeal
clefts, post-anal
tail
4) suspension-feeding
devices.
5) have some embryonic
development outside the mother's uterus.
6) Cephalochordata
7) a partial erect stance
8) Homo sapiens originated in
9) Humans and apes diverged from a common
ancestor about 5-10 million years ago.
10) 50,000 years ago.
11) lampreys
12) feeding
13) chitin; cartilage
14) opposable thumbs in
many species
15) reptiles and mammals
16) bipedalism
17) Chondrichthyes
18) skeletal rods that had supported pharyngeal
(gill) slits.
19) cartilaginous
endoskeleton
20) chondrichthyan teeth
21) They have a lateral line that is sensitive to
changes in water pressure.
22) lungfishes
23) walked on two legs.
24) bony fishes
25) a bony
endoskeleton, operculum, and usually a swim bladder.
26) Examine the teeth.
27) chondrichthyans.
28) avian
feathers reptilian
scales mammalian
hair
29) mammals.
30) feet
with digits.
31) feathers.
32) phylogenetic
relatedness of birds and reptiles.
33) 2, 3, 4, 1, 5
34) Prosimians
35)
allows incubation of eggs in a terrestrial environment.
36) Mesozoic
37) the amniotic egg
38) lizards
39) Cretaceous "crisis"
40) birds
41) c
42d
43)c
44) b
45) a
46) e
47) d
48) a
49)b
50) e
51) c
52) e
53) c
54) c
55) b
56) d
57) a
58) e