Consider the Figure Below

question 20

Multiple Choice

Consider the figure below.What does the arrow pointing from cyanobacteria to plants and algae indicate according to the endosymbiotic origin of eukaryotic cells?

• A) Cyanobacteria are the early evolutionary ancestors of plants and algae.
• B) Cyanobacteria merged together to form plants and algae.
• C) Cyanobacteria serve as a common source of energy for plants and algae.
• D) Cyanobacteria were internalized by early cells to form the chloroplast present in plants and algae.

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Definitions:

Average Tax Rate

The percentage of total income that is paid in taxes, calculated by dividing the total tax paid by the taxpayer's total income.

Marginal Tax Rate

The percentage of tax applied to your income for each tax bracket in which you qualify.

Progressive Tax

A taxation system where the tax rate increases as the taxable amount rises, thereby imposing a higher percentage rate on those with higher incomes.

Marginal Tax Rate

The rate at which the last dollar of a person’s income is taxed, indicating the impact of an additional dollar of earnings on the amount of taxes paid.