Exam 36: Resource Acquisition and Transport in Vascular Plants

A fellow student brought in a leaf to be examined. The leaf was dark green, thin, had stoma on the lower surface only, and had a total surface area of ten square meters. Where is the most likely environment where this leaf was growing?

Photosynthesis ceases when leaves wilt, mainly because ________.

Which of the following observations provides the strongest evidence against root pressure being the principal mechanism of water transport in the xylem?

Some botanists argue that the entire plant should be considered as a single unit rather than a composite of many individual cells. Which of the following cellular structures best supports this view?

Movement of phloem sap from a source to a sink

Compared with a cell with few aquaporin proteins in its membrane, a cell containing many aquaporin proteins will

Which one of the following statements about transport of nutrients in phloem is correct?

In plant roots, the Casparian strip ________.

What is the main force by which most of the water within xylem vessels moves toward the top of a tree?

Which of the following is a correct statement about sugar movement in phloem?

If isolated plant cells with a water potential averaging -0.5 MPa are placed into a solution with a water potential of -0.3 MPa, which of the following would be the most likely outcome?

A plant developed a mineral deficiency after being treated with a fungicide. What is the most probable cause of the deficiency?

Which of the following would be least likely to affect osmosis in plants?

The protoplast consists of ________.