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In a rock pool, a student encounters an organism with a hard outer covering that contains much calcium carbonate, an open circulatory system, and gills. The organism could potentially be a crab, a shrimp, a barnacle, or a bivalve. The presence of which of the following structures would allow for the most certain identification of the organism?
Common-Law Families
Families formed by couples who live together without being legally married but are recognized as having a similar status to married couples for legal and social purposes.
Blended Families
Family consisted of a couple and their children from previous relationships with or without children from current relationship.
Complex Step Family
A family structure where children from previous relationships are combined into a new family unit, often leading to intricate relationships and dynamics.
Simple Step Family
A family form where only one spouse has children from a previous relationship, integrating them into a new familial setup.
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