Table 19.1 Table 20.3 Construct an evolutionary history using the information in

Question

Table 19.1

Table 20.3
Construct an evolutionary history using the information in Table 19.1 in Chapter 19 and Table 20.3 Use names. Include only the 4 traits listed in these tables. You will need to lumpsome organisms of the groups of and some traits. The is a colonial ancestral protist derived is trait distinguishing from the animals, the the new) t at the end of the branches coming off the main slanted line. Recall that the progression of evolution (and time) is from bottom to top (outgroup) (Parazoa) groups here) (5 groups here) (2 animals multicellularity

Explanation / Answer

Embryonic

Development.

Radial (Adults)

Bilatetal (Larvae)

Phylum Organization Symmetry Germ layers

Embryonic

Development.

Porifera Cell Assymetrical 2 N/A Cnidaria Tissue Radial 2 N/A Platyhelminths Organ Bilateral 3 Protostomes Nematoda Organ Bilateral 3 protostome Mollusca Organ Bilateral (some are assymetrical) 3 protostomes Annelida Organ Bilateral 3 Protostomes Arthropoda Organ Bilateral 3 Protostomes Echinodermata Organ

Radial (Adults)

Bilatetal (Larvae)

3 Deuterostomes Chordata Organ Bilateral 3 Deuterostomes

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