Animal 1 answers even

2) cell wall

4) by ingesting it.

6) 3, 4, 1, 2

8) sexual reproduction

10) presence of Hox genes

12) 2, 4, 3, 1, 5

14) mineralized hard parts

16) gene duplication

18) 2, 4, 1, 3

20) 5, 3, 2, 1, 4

22) body symmetry

24) have radial symmetry.

26) a sessile existence.

28) sponge.

30) Porifera-coelomates, mouth from blastopore

32) motility and active predation and escape.

34) true tissues.

36) have a body cavity completely lined by mesodermal tissue, whereas pseudocoelomates do not.

38) Muscular activity of its digestive system distorts the body wall.

40) gastrula.

42) spiral and determinate cleavage, blastopore becomes mouth, schizocoelous development

44) indeterminate cleavage.

46) sea star.

48) true tissues or no tissues.

50) Some, but not all, grades reflect evolutionary relatedness.

52) nucleotide sequences of homologous genes

54) monophyletic.

56) metazoans.

58) annelids echinoderms

60) The fossil evidence will be understood to have been incorrect because it is incomplete.