Mature Vessel Elements

question 9

Multiple Choice

Mature vessel elements:

• A) form sieve tubes in the vascular tissue.
• B) have pits in their side walls, which allow water to be transported laterally.
• C) are alive and contain cytoplasm.
• D) are given support by companion cells.
• E) occur in pairs, forming stomata in the epidermis.

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Definitions:

TR

Total Revenue, which is the total income generated from the sale of goods or services.

TC

Total cost, which is the sum of all costs incurred by a firm in the production of goods or services.

Economic Profit

The variance between sales income and the alternative costs of the inputs needed.

Economic Profits

The difference between total revenue and total explicit and implicit costs.