Dora Has Recently Started Working on a Research Study That

question 71

Multiple Choice

Dora has recently started working on a research study that hypothesizes that people who have a defect in a specific gene may have a predisposition to depression.As a second hypothesis in the study,the researcher is studying the impact of a significant lack of social support in triggering the onset of depression in such people.If Dora's research successfully validates both hypotheses,which of the following conclusion may be drawn?

• A)A defect in the gene Dora is studying is directly linked to depression.
• B)A lack of social support always leads to clinically significant levels of depression.
• C)The defective gene and lack of social support produce a heightened risk of depression.
• D)The defective gene is recessive,and depression is a result of polygenic inheritance.

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Definitions:

Radial Growth

The pattern of growth that expands outward in all directions, commonly observed in fungi, certain plants, and some animals like jellyfish.

Cork Cambium

A lateral meristem that produces cork cells and cork parenchyma; cork cambium and the tissues it produces make up the periderm (outer bark) of a woody plant. Compare with vascular cambium.

Secondary Xylem

The part of a plant that contributes to wood formation, resulting from the division of cambium cells and providing structural support and water transport.

Cork Cells

Specialized cells in the bark of a plant that are dead at maturity and serve to protect and waterproof the plant.