Refer to the Figure

question 28

Essay

Refer to the figure.
In the figure, identify the following groups: protostomes, deuterostomes, arrow worms, calcareous sponges, chordates, cnidarians, ctenophores, demosponges, ecdysozoans, echinoderms, glass sponges, hemichordates, lophotrochozoans, and placozoans.Additionally, identify these distinguishing traits marked with dots on the phylogenetic tree: bilateral symmetry along an anterior-posterior axis, three embryonic cell layers, centralized nervous system; blasotopore develops into mouth; blastopore develops into anus; choanocytes and spicules; exoskeleton molting; notochord; radial symmetry, silicaceous spicules; unique cell junctions, collagen and proteoglycans in extracellular matrix; nerve nets (listed twice); distinct organ systems.

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Definitions:

Mexican American Families

Refers to the family structures, dynamics, and cultural practices of individuals of Mexican descent living in the United States.

Colonization

The process by which a central system of power dominates the surrounding land and its components, often involving the establishment of colonies and the exploitation of resources and indigenous peoples.

Transient Jobs

Temporary or short-term employment positions that lack permanence, often with irregular hours and without the promise of long-term employment.

Wicked Problems

refers to complex societal issues that are difficult to define and even harder to solve, as they are interconnected with other problems and change over time.