Water Flows into the Source End of a Sieve Tube

question 92

Multiple Choice

Water flows into the source end of a sieve tube because

• A) sucrose has diffused into the sieve tube, making it hypotonic.
• B) sucrose has been actively transported into the sieve tube, making it hypertonic.
• C) water pressure outside the sieve tube forces in water.
• D) the companion cell of a sieve tube actively pumps in water.

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Definitions:

Cash Flows

The movement of money into and out of a business or project, considered as a measure of its financial health.

Financial Break-even Point

The level of revenue necessary to cover all operating and financial costs, including interest and principal payments, yielding a net income of zero.

Discounted Payback Period

The amount of time it takes for an investment to generate enough cash flows to recover the initial outlay, with the cash flows discounted to account for the time value of money.

Forecasting Risk

The potential deviation of outcomes from predicted results in financial projections, due to uncertainties in the market or inaccurate assumptions.