Plants and Algae Most Recently Shared a Common Ancestor 480

question 18

Multiple Choice

Plants and algae most recently shared a common ancestor 480 million years ago,and plants colonized land shortly after that.Light,water,minerals,and dissolved gases surround the whole body of a submerged green alga,and the buoyancy of water provides physical support.What part did plants evolve to absorb gases without drying out on dry land?

• A)pollen
• B)stomata
• C)vascular tissues
• D)cuticle
• E)lignin

---

Definitions:

Supply Curve

A graphical representation showing the relationship between the price of a good and the amount of it that producers are willing to supply at each price level.

Total Variable Costs

The sum of all costs that vary directly with the level of production or output in the short term.

Output

The quantity of goods or services produced within a given time frame by a firm, sector, or country.

Equilibrium Price

The market value at which there's a perfect match between quantity of goods available and quantity desired by buyers.