Exam 29: Resource Acquisition,nutrition,and Transport in Vascular Plants

Phloem transport is described as being from source to sink.Which of the following would most accurately complete this statement about phloem transport as applied to most plants in the late spring? Phloem transports ________ from the ________ source to the ________ sink.

Photosynthesis begins to decline when leaves wilt because

The rise (upward mobility/transportation)of xylem sap by the cohesion-tension mechanism begins at the

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?

Why does overwatering a plant kill it?

Ignoring all other factors,what kind of day would result in the fastest delivery of water and minerals to the leaves of a tree?

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

Which of the following is considered an organic fertilizer?

Which of the following tissues have revolutionized the advancement of vascular plants with extensive shoot and root systems on land in the process of evolution?

The transpiration pull is due to the ________ that causes water to move up through the xylem that begins at the surface of mesophyll cells.

Maximum amount of water loss occurs through stomata that account for ________% of the external leaf surface area.

Which of the following was an essential adaptive feature for the evolution of plants from water to the land?

Arrange the following tissues,organs,chemicals,and flows in the correct cyclical steps in the bulk flow of phloem sap. i.sieve tube ii.xylem vessel iii.sucrose in leaf (source) iv.sucrose in root (sink) v.bulk flow by negative pressure vi.bulk flow by positive pressure

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

In west Texas,cotton has become an important crop in the last several decades.However,in this hot,dry part of the country there is little rainfall,so farmers irrigate their cotton fields.They must also regularly fertilize the cotton fields because the soil is very sandy.Figure 29.1 shows the record of annual productivity (measured in kilograms of cotton per hectare of land)since 1960 in a west Texas cotton field.Use these data to answer the following question(s). Figure 29.1 -Based on the information provided in Figure 29.1,what is the most likely cause of the decline in productivity?

Which of the following phenomena occurs naturally in plant cells?

Active transport would be least important in the normal functioning of which of the following plant tissue types?

Arrange the following five events in an order that explains the mass flow of materials in the phloem. 1)Water diffuses into the sieve tubes. 2)Leaf cells produce sugar by photosynthesis. 3)Solutes are actively transported into sieve tubes. 4)Sugar is transported from cell to cell in the leaf. 5)Sugar moves down the stem.

Rhizobia,actinomycetes,and cyanobacteria all share the common feature that they can

The size of clay particles ranges from ________ in diameter.