HVWilson Worked with Sponges to Gain Some Insight into Exactly

question 3

Multiple Choice

H.V.Wilson worked with sponges to gain some insight into exactly what was responsible for holding adjacent cells together.He exposed two species of differently pigmented sponges to a chemical that disrupted the cell-cell interaction,and the cells of the sponges dissociated.Wilson then mixed the cells of the two species and removed the chemical that caused the cells to dissociate.Wilson found the sponges reassembled into two separate species.The cells from one species did not interact or form associations with the cells of the other species.How do you explain the results of Wilson's experiments?

• A)The two species of sponge had different enzymes that functioned in the reassembly process.
• B)The molecules responsible for cell-cell adhesion were irreversibly destroyed during the experiment.
• C)The molecules responsible for cell-cell adhesion differed between the two species of sponge.
• D)One cell functioned as the nucleus for each organism,thereby attracting only cells of the same pigment.

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Definitions:

Bottom Quintile

The lowest fifth or 20% segment of the population in a statistical distribution, often used in reference to income levels.

Income

Earnings received by an individual or business for their labor, investments, or through the sale of goods or services.

Lorenz Curve

Data plotted to show the percentage of income enjoyed by each percentage of households, ranked according to their income.

Perfect Income Equality

A theoretical economic condition where all individuals or households earn exactly the same income, leading to absolute equity in income distribution.