Animals are distinguished from other groups of eukaryotic organisms in that they:
A) are multicellular heterotrophs lacking cell walls.
B) have embryos that include a gastrula stage.
C) produce collagen.
D) are mobile.
Correct Answer:
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Q15: Examine Figure 44.1, below. According to this
Q16: Early scientists used morphological characteristics to create
Q17: Which of the following is NOT a
Q18: Compared with sponges, cnidarians have a wider
Q20: Echinoderms are unique in their:
A)five-fold symmetry.
B)skeletons made
Q21: A protostome is distinguished by a(n):
A)endoderm that
Q22: Examine Figure 44.1, below. To which group
Q23: A deuterostome is distinguished by a(n):
A)endoderm that
Q24: Because they lack well-defined and complex organ
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